[bygddy]

Assuming stock bottom end, you may be as low as 8:1 comp right now....with 76cc heads. Small Carb, no comp, bigish cam, all of this spells dissapointment. If your leaving the bottom end as is, then get heads with a 58cc chamber, run a 0.015 head gasket, get yourself a 750 Carb, and watch as all of it comes together and makes far more power then you currently have. Call this guy. Speier Racing Heads and tell him what you have, and want to accomplish. His prices are excellent, he is available all hours of the day...and will tailor the heads to your combo.....ie: 58 CC chambers for 10:1 compression.
And there you are.

[runn141]

Originally Posted by cdminter59

These Dart heads are a good deal for the price. Dart SHP Special High Performance Cylinder Heads 127122 - SummitRacing.com. Of course you will have to check out your engine to know which chamber volume to buy. Keep your C.R. at about 9.5:1 -10:1 and you won't have a problem.

i can vouch for those heads. i had to go with the 72cc to keep my compression at 9.2:1.

[496CHEVY3100]

Check out a site called ASA Performance in Columbus Ga ,also listed as ,abad71camaro.same buisness he has aluminum sbc heads 64cc 200 or 220 runners Complete and assembled For Under $800 with free shipping.lots of locals run these ,I donot mine is a Big block with custom aluminum heads ,Good luck

[bygddy]

Lots of good suggestions here, but at the end of the day research is your friend. The dart SHP'S seem to be somewhat dissapointing, the brodix IK's have a great rep for the most part, the kmj is procomp stuff, not saying its good or bad....just saying do you research. I went with the Pro-Filers because they are price wise comparable or cheaper then the brodix or dart, yet being compared with, and some claim better then a much higher priced AFR eliminater head. And there was enough info out there to make a somewhat educated desicion. And when I E-mail a company at 10pm at night hoping to hear back the next day, and get a response 10min later. (Speier Racing Heads) I'm happily surprised. Unfortunately he was out of stock at the time, but still answered my questions, and still reccomended the pro-filers.
Some food for thought...some inane arguments, but when its a fight over which is better, the pro-filer or the afr, you know your in good company either way.
How to choose the correct cyl head - Page 2 - Chevelle Tech
Profilers 195 vs. Afr 195 - Page 2 - Team Camaro Tech
Air Wolf 220 Results - Chevelle Tech

[73nova350]

thanks for all the info guys, any idea on the power gain i would get out of this?

[cdminter59]

I wouldn't think there is anyone that can tell you what size combustion chamber to purchase without knowing the piston brand or the volume of the piston. (Flattop-5cc dished-18cc). While the heads are off measure the distance from the top of the block to the top of the piston. Write it down and keep it handy because you will need it to figure your quench, head chamber volume, and compression ratio.

[camaro355]

find a set of vortec heads they are the best cast iron heads gm has with a valve job and port work and bowls blended these heads are pretty impressive

[techinspector1]

Originally Posted by camaro355

find a set of vortec heads they are the best cast iron heads gm has with a valve job and port work and bowls blended these heads are pretty impressive

I see that you're new here and want to help, so I'm gonna try to help you along as well. The L31 Vortec cylinder heads are the best PRODUCTION cast iron heads that GM ever produced. You can't say they are the best cast iron heads that GM ever produced because there are other BowTie cast iron heads that GM has produced that will put the L31 heads to shame. Difference is, they're not PRODUCTION heads.

So, again, here's the way to say it.....
L31 Vortec heads are the best flowing SBC PRODUCTION cast iron heads that GM ever produced.

Hang in there, it gets easier......

[vinniekq2]

how about,vortec L31 cast iron heads are very good for moderate performance applications. Just so as to not make it look like vortec heads are just great heads.They have quite a few limitations.

[73nova350]

i have a edelbrock 600 carb with vac secondaries and i also have a holly 650 double pumper with mechanically secondaries, which one would be better with this setup

[vinniekq2]

650 double pumper is a very good performance carb for small or mild engines.I use 750s as a minimum usually

[Hogg]

Originally Posted by vinniekq2

how about,vortec L31 cast iron heads are very good for moderate performance applications. Just so as to not make it look like vortec heads are just great heads.They have quite a few limitations.

Wording it that way implies that there are other production GEN 1/1E heads than the L31 Vortec heads.
If you want a better flowing GEN 1 head, you have to go to the aftermarket.

Lift limitations are fixed by springs/retainers.
They do require a dedicated intake.

If you want to take a production head, slap it on a shortblock with the goal of making the most power/torque, the head that will do the job is the Vortec L31head.

Not only are they great heads, GM never installed a better GEN 1 head on any vehicle they ever made, car or truck.

peace
Hog.

[vinniekq2]

hogg what do the chevy 291s and 292s flow? after porting what do the 292s flow. which is a better casting, 31s? or 292S?