[michiganman]

i have a stock 350 in my chevelle with 650 edelbrock carb, i have a set of bare vortec heads i want to put on, what intake, cam, looking to build a weekend cruiser with nice lope, and other parts am i going to need?
thanks

 

[grovey]

you'll either have to limit the lift to around 470, or machine the guides so you can swap springs. also you'll need self aligning rockers or screw in studs and guide plates installed to run gen 1 rockers. you should post more info... like gears you have/ are buying. are you planning on a stock converter, or are you thinking of buying a converter with more stall to run a bigger cam than say ....470 lift. what are your goals ?

 

[BillsCamino]

If the 350 has flat top pistons, you'll need to watch the compression ratio...those Vortec heads have chambers in the 61-63cc range.

 

[Highway Star]

With the right springs and retainers you can easily go over .500" lift. You need a GM vortec carb intake or the edelbrock vortec intake.

 

[michiganman]

right now it has 3.42 open, stall i was thinking something around 2500, or should i look for different heads and sell the vortec, i need to get a performance intake either way

 

[michiganman]

motor has 30,000 miles, rebuilt 6 years ago runs good, but its stock like 200hp

 

[wade w]

Take a look at this for the springs. http://www.carcraft.com/techarticles/vortec_valve_spring_upgrade/index.html

And for the intake it really comes down to what you want, but its hard to beat the performer RPM air gap for a all around intake.

 

[CNC BLOCKS N/E]

If the 350 has flat top pistons, you'll need to watch the compression ratio...those Vortec heads have chambers in the 61-63cc range.

I wish the GM heads were 61CC chambers we have to cut alot of those heads to 61 CC for alot of 11:01 cirlce track builds so far we ones se have seen are right at 65 to 66CC's

The mexican casting are not what GM advertises as far as intake runner size as we find them at 159CC and the older non mexican castings run right at 170CC's

 

[pink panther]

if i were u i'd keep vortec's and get them open up find a good places that does head servise and u can go above 470 lift and go 1.6 rockers their the best bang for the buck.

 

[koreyr6]

I built a 350 with the smaller e tec vortec edelbrock heads went real good with comp magnum 280 h cam. And air gap intake.

 

[BillsCamino]

I've measured three pairs of 906 castings...pulled right off stock truck engine cores.
NONE measured larger than 63cc. Maybe it was because of the hardened exhaust seat in that casting.

 

[grovey]

I wish the GM heads were 61CC chambers we have to cut alot of those heads to 61 CC for alot of 11:01 cirlce track builds so far we ones se have seen are right at 65 to 66CC's

The mexican casting are not what GM advertises as far as intake runner size as we find them at 159CC and the older non mexican castings run right at 170CC's

are the earlier castings the 062's ? not the 906's.... ? isn't the newest a 060 casting ?

 

[CNC BLOCKS N/E]

are the earlier castings the 062's ? not the 906's.... ? isn't the newest a 060 casting ?

We have used both castings the 906 castings which were the earlier ones and we have used the non mexican 062 castings and probably since 1996 we have seen probably 50 plus sets of them and non so far have been 61 or 63 CC chambers.

I wish I could find some heads that were 61 CC as it would sure save alot of extra work cutting the decks and correction cutting the intake faces!!!!!

 

[novadude]

Carl - Are the mexican heads 65-66cc, or didn't you ever measure the mexico 062 casting chambers?