Just got these heads yesterday, i got them dirt cheap, for 250 (is that a good deal), :hurray:well just wanted to ask the experts, i want to make serious power with these but i dont quite know what parts to put with it.. i have a 69 chevy 350 bored .30 over will do .40 later, i was thinking of stroking it to 383 with eagle crank and stock rods, but this is where i ask the experts, what parts i should install on that engine to make pretty good power and also what HP can i achieve with these heads.. The heads are 0-12367712 b871-4 gmpp 1829a zeus stampped, i was told they were 2.0/1.5 valves, with stock stamped 1.5 rocker arms and original springs it came with, also i was told these were the heads that came with the zz430....that guy also told me to use the vortec style intake to get the most out of that engine, but i did check around and i beleive i can use any intake as long as it has the right ports..well if there are any suggestions please let me know, thanks
Help With gm performance aluminum heads,
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69chevelleX2
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Just got these heads yesterday, i got them dirt cheap, for 250 (is that a good deal), :hurray:well just wanted to ask the experts, i want to make serious power with these but i dont quite know what parts to put with it.. i have a 69 chevy 350 bored .30 over will do .40 later, i was thinking of stroking it to 383 with eagle crank and stock rods, but this is where i ask the experts, what parts i should install on that engine to make pretty good power and also what HP can i achieve with these heads.. The heads are 0-12367712 b871-4 gmpp 1829a zeus stampped, i was told they were 2.0/1.5 valves, with stock stamped 1.5 rocker arms and original springs it came with, also i was told these were the heads that came with the zz430....that guy also told me to use the vortec style intake to get the most out of that engine, but i did check around and i beleive i can use any intake as long as it has the right ports..well if there are any suggestions please let me know, thanks
I found the casting number for the ZZ430 heads (the GM Perf Fastburn heads as they're called) to be 12367712 in the book. Might be a typo, I didn't research your number. If those are the heads, and they're not messed up, you got a great deal. I would think you could get over 500hp no prob with them.
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Right...
"Vortec" is a marketing buzzword that translated into plain English means, "we put the intake ports in a different place". Specifically, they're about ¼" up closer to the valve cover flange; so much higher in fact, that most intakes for older heads won't even completely cover them, let alone match to them well enough to work right.
Which means, you can use any intake as long as it's a Vortec one. "Believing" what you want to believe won't change the dimensions of the parts.
"Vortec" is a marketing buzzword that translated into plain English means, "we put the intake ports in a different place". Specifically, they're about ¼" up closer to the valve cover flange; so much higher in fact, that most intakes for older heads won't even completely cover them, let alone match to them well enough to work right.
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No, then, i think that is right..the 12367712 is the zz430, and the heads i have are just 99+ 2.0 1.5 heads, that guy i bought them off of, said they ran good but the block wich is a 14093638 serial 0728zzz engine he tried them on, said that was kind of weak cause the engine had low compression, is that block good, he is also selling it at a very good price if some one is interested.
Those heads are awesome. They have dual bolt pattern for the intake and valve covers. If you don't want to put guide plates on them , you can use the self aligning rocker arms. The GM Hot Cam kit will go perfect with your combination. nice Find!!!
Dave
Dave
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Thanks, Man....that is what i thought so, what power would i be looking at with these heads and the cam you suggested..also what style intake should i ask for at the parts store when dealing with these heads..also is the 383 setup good for my 350, i have a 2 bolt main, original 350 off a 69 chevelle, wanted to look for a four bolt main block because they say they are stronger, also what type of carburator would work good with this engine, i have the holley 3752 which is said to be rare model too, but i cant find any more info from anyone here, also last, should i spend the money on that 14093638 zz block, is it really worth it.. thanks everyone keep up the good work:beers:
When Gm built the ZZ430 they used the Fast Burn heads, the Hot Cam Kit, GM dual plane which looks like a Edelbrock RPM, a 750 vacuum seconday Holley, and a ZZ4 short block it made 430 HP and I think 430 ft/lbs of torque. If you decide to build a 383 or a 350 you should have a pretty stout combination. I don't recognize your carb number , but I am sure you can use your short block from your 69 it will be just fine.
Dave
Dave
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get a vortec intake for it..
the only "regular" bolt pattern intakes that will work are the raised runner single plane intakes- like a Super Victor and the like.
those heads with the HOT cam and a Perfromer RPM style intake will make for a beast of a motor.
the only "regular" bolt pattern intakes that will work are the raised runner single plane intakes- like a Super Victor and the like.
those heads with the HOT cam and a Perfromer RPM style intake will make for a beast of a motor.
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Thats exactly what i wanted to hear, thanks guys:hurray:....The only problem i have right now is trying to decide what to make of it, a 383 already with regular heads is a beast, now with these, im guessing it will be making a very good hp rate compared to a 350, but like you guys said, i have to make the right combo, too much compression is very bad, i want to be able to use it on the street/strip...while having the brute power of a big block... i will use this engine i have off the chevelle, but will have to consider getting stronger rods right? As far as vortec intakes, these vortec intakes come in a carb pattern right..meaning for a holley 750 cfm double pumper..also does anyone here know anything about the 14093638 0728ZZZ engine, beleived to have the one piece rear main, also does it have the forged crank and rods, the same guy who sold me the heads and carb has to sell this engine too, to get rid of everything he has to make room for his house, and im trying to help him out getting all of it out.
I'm still looking into the PMs you sent me by the way.
I don't see the engine number you list come up, but you can ID a one piece seal pretty easily. They look like this:
![Image]()
You should be able to ID a forged crank by looking at the casting marks. A forged crank will have a wide (3/4" or so) raised band running the length of the crank on the unmachined areas. It's where the 1/2s of the tooling came together when originally making it.
The vortec intake will be the same as a regular intake other than the ports have been machined to match the heads, and where it bolts to the head is different. The vortec head uses only 8 bolts instead of 12 on the older types. The 8 bolts also are in a slightly different position and run vertically instead of canted with the heads facing the engine centerline. You will see both bolt patterns on the fastburn head.
The fastburn head has 62cc chamber volume.
I don't see the engine number you list come up, but you can ID a one piece seal pretty easily. They look like this:
You should be able to ID a forged crank by looking at the casting marks. A forged crank will have a wide (3/4" or so) raised band running the length of the crank on the unmachined areas. It's where the 1/2s of the tooling came together when originally making it.
The vortec intake will be the same as a regular intake other than the ports have been machined to match the heads, and where it bolts to the head is different. The vortec head uses only 8 bolts instead of 12 on the older types. The 8 bolts also are in a slightly different position and run vertically instead of canted with the heads facing the engine centerline. You will see both bolt patterns on the fastburn head.
The fastburn head has 62cc chamber volume.
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this is the numbers i found on a site..
14093638...350...87-95...2 or 4...Roller or flat tappet cam one-piece rear seal.
also the owner said this was like a crate motor...and the serial says 0728ZZZ, which he said was a special engine
14093638...350...87-95...2 or 4...Roller or flat tappet cam one-piece rear seal.
also the owner said this was like a crate motor...and the serial says 0728ZZZ, which he said was a special engine
hey I also have a gm performance heads 0-12367712 but im running with 12 to 1 compression some race shop said if I add these on will bring my compression down to 11 to 1 which would be better for me what cam can would be good plus roller rockers and push rods can any one help
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For the money you spent, and if they are not damage, as has been said you got a excellent set of heads. They arent the best, but for 250 dollars, WOW.
Intake selection is limited for those heads.
The zz430 combo is very strong from idle to 6000, if you use the hot cam in a 383 you will be very torquey from idle to 5300 to 5500 rpms.
Intake selection is limited for those heads.
The zz430 combo is very strong from idle to 6000, if you use the hot cam in a 383 you will be very torquey from idle to 5300 to 5500 rpms.
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^^^ This...
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