[tziip]

Hello Everyone,
I am building a 421 sbc and I have these aluminum heads but I need help to identify these heads. I am not even sure if these heads will support 500-550hp. The only information on the heads are the DART insignia, I-036-A, 2.08 intake valve, Manley (42355) push rod guides and screw in studs. I believe they maybe DART 220cc but I am not sure.
Any information on a 500-550 sbc combos are welcomed.
Any information would be appreciated.

Thanks,
Tee
Engine going into a 68 Elcamino 4spd.

 

[nitrofox]

Try emailing Dart. I had a set and contacted them and they were able to provide all the info I needed ( intake runner size, chamber cc, and flow figures ). They can only tell you how they left their factory.

 

[tziip]

Try emailing Dart. I had a set and contacted them and they were able to provide all the info I needed ( intake runner size, chamber cc, and flow figures ). They can only tell you how they left their factory.

Thanks Nitrofox, they heads also have 7/16 screw in studs like a BBC. My regular lunati rocker arms won't fit.

 

[bracketchev1221]

I am going to make a wild guess. The I-036 number looks like a designation that world products uses on their heads. I am going to guess they are EARLY Sportsman II heads when world and Dart were working together. So 200 cc heads.

 

[BillK]

Pick up the phone and call them. They will tell you whatever you need to know about the heads.

 

[Ericnova72]

Just going off general appearance of the shape of various parts of the casting, it looks to be at least 25 years old.

I think bigger than 200cc, due to the eyebrow bosses betwen the exhaust ports on the exhaust side that are there for alcohol injection down nozzles