The heads I bought flowed .254 @ .500 and .266 @ .600 are those numbers decent? How well do you think they will match up to my GM847?

 

That's pretty good for LT1 castings. I've seen better, and worse. But definetly not a bad port job at all.

 

Cool, oh yeah they are LT1 heads and not LT4 forgot to say that, how do you think they will match up to my GM847? The guy that did them for me told me that if in a month after they go on my car I don't like them he will do me another set for free.

 

how are the .2-.3 and .4 lift numbers?
upper lift numbers mean squat if the mid range sucks

 

Intake
71 @ .100
141 @ .200
201 @ .300
233 @ .400
254 @ .500
262 @ .550
266 @ .600

Exhaust
64 @ .100
119 @ .200
149 @ .300
174 @ .400
188 @ .500
194 @ .550
207 @ .600