[cool rockin daddy]

You better start thinking about matching intake port size to how you are going to drive. .222/.222 cam is not very radical. That's the average duration of a Comp Extreme Energy 262 (.218/.224). You have been talking about GM heads which are 170 cc intake port volume at the max (unless ported). Now you are talking about Sportsman heads that come in at 200 cc intake port volume which is TOO BIG for a mild street car! The car will be a slug at lower speeds with lazy throttle response. You want to keep your intake ports around 180 cc's or less for snappy response and good low end torque with mild cams. I know, I have a .030 over 350 with flattops, above mentioned cam (.470 lift), performer manifold, Demon 650, and pocket ported 041 GM heads. Every single head manufacturer I have called have told me unless I want to go more agressive with the cam and stall converter, stay with 180 or below heads! By the way, that engine has about 9.5:1 compression ratio and I have no problem with 91 octane gas. Compression ratio is one thing, intake port volume is another. Match the heads to what the cam is capable of delivering. If combustion chamber is too big have the heads milled so you get a chamber size of 68 cc to be really safe. One more thing, Chevy High Performance tested the Dart SS heads and they really did okay. Don't get taken in by flow numbers alone, it is how and when the air moves in a port, and how the air/fuel mixture burns in a certain chamber design that gives the power. I would really try to find a set of Dart Iron Eagle 180's on e-bay or your area.

[rac43]

Thanks lots and after reading all of the post I have decided to go for the Iron Eagle 180's. They best suit my 222/22 cam as far as I can tell. Thanks to everyone, I needed your help! This is better than living next door to a hot rod shop!

[Old Yeller 1970]

Good luck. Be sure to let us know how it turns out.

[Old Yeller 1970]

Originally Posted by cool rockin daddy

Every single head manufacturer I have called have told me unless I want to go more agressive with the cam and stall converter, stay with 180 or below heads!

I second that. I have a set of RHS Pro Lightning 180 heads in Old Yeller (SBC 350) and they absolutley rock on the bottom end acceleration. That's even with a Competition 280 Magnum cam ground on a 114 LSA.

[cool rockin daddy]

I think that is a wise decision. When it is time for me to get my new heads (hopefully) I will be going with Iron Eagle 180's or, if I win a lot of jackpots bowling and can afford them, the Dart Pro 1 180's in aluminum. Good luck. :Cool:

[chrismac]

hey you can get good heads off of ebay. I payed 600$ for a set of new aluminum heads bare. They were manufactured from RHS. 235 cc intake runners and 72 cc combustion chambers. I watched ebay for good deals on them. I have seen the sportsman 2s go for about 500$ complete. My father run the sportsman heads for 10 years on a 327 for 10 years before a valve broke when i turned 16. Your options are almost endless when it comes to heads under 1g.

[cool rockin daddy]

yep, you sure do have a lot of choices. But for the cam he is running, he needs a 180 cc head or smaller.

[rac43]

disregard, thanks