I'm sure they are all not the exact same but ball park....

 

Here is a link to an LT1 head flow chart. It shows stock heads vs aftermarket heads.
LT1 head flow chart

good luck with your project

bob spears

 

Hey Bob thanks for that awesome chart. I noticed you said "good luck with your project". You musta seen all my other posts on porting my own heads huh. I'm debating if I should get them flowed. In a way I don't want to because if they are crappy I'll kick myself.

DAMN BOB......YOU GOT ONE KICKA$$ CAR!!! .
How much you got invested in that?????? SAWEEEEET

 

I spent way too much on this car. One place where I spent a lot of money is on heads. I got the CNC Machine CNC ported heads that flow well. An engine cannot run if it cannot breathe.

bob

 

That is awesome, I love benchmark comparisons, makes research so much easier. Thank you.

 

On our bench, the 92-95 castings peak in the 210-212 range on the intake and 163ish on the exhaust.