I'm curious what LT1s have for choices on aftermarket heads? You can't use any SBC heads because of the reverse coolant flow, so what is out there specially designed for LT1s. All I know for are AFRs.

 

the best thing to do is get the stock lt1 heads ported and polished

 

Well what would you use if your goal is to have 700+hp. I'm sure you wouldn't use ported stock heads. I just wanna know what LT1s have as options on aftermarket heads.

 

Why not rework your heads? You would be pleasantly suprised.

 

Depending on your combo, you could feasibly get 700 out of a well done set of stock p&p heads. NOT N/A mind you, but on the right application I think it could be done.

 

So its not worth buying aftermarket heads? Just redone the stockers. Well they be able to flow as well as the aftermarket ones? Can you put bigger valves in them ie. 2.08 & 1.65?

 

Yes you can put in bigger valves, not quite a 2.08 though. My heads, for example, have 2.02/1.55 valves, and flow 274@.550, but the mid lift numbers are where they stand out. At .400 they're flowing low 250's.

The downside to the stock ported heads is that if you're building a large high revving motor, they won't be able to support it. Then, you'll need something aftermarket with larger runners.

 

Nobody has answered your question yet, so here ya go:

LT1 Stock heads (GM)
LT4 Heads (GM)
AFR Heads (LT1 to LT4 with various cc sizes)
Edelbrocks
Dominion (4Valve Heads)

 

Add to the above list:

Canfields, if you can find a used set, because they stopped making them.

The world's quickest LT1 (9.04@155, 1,125HP) used a set of highly modified Canfields. Before he went over 1,000HP, he was using a set of LPE CNC LT4 heads, with a little extra tweaking.