Thanks guys!
They are 72cc, but after valve job/chamber cut they ended up at 74.5cc.
I milled them down to 70cc to make 10.6:1.

Yes I was a bit disappointed in the power...we were planning on having 550'ish HP and after talking with Edelbrock they are not changing the head anymore so this is how they'll be. They told us the head is now geared more for the PORTER or ENGINE BUILDER...kinda sucks because the old port was really a bolt it on and make some power deal and now, just like every other Mopar head out there it needs TLC.
But....after some port work I'd say it's going to flat out work. I'd bet with porting we'd see that missing 40+HP.

No other changes seem to be in place from what I could tell.
Still for 2500.00 more than the mild 427HP version it made decent power. Would have been nice to hit 550's but porting put it over budget.


Brian Hafliger