Originally Posted by cobalt327
In any event, wild man- check out this build
to get an idea of what kind of flow (CNC ported AFR Magnum 315's w/2.25" x 1.88" valves milled to 110 cc chamber volume, being fed by a Vic Jr.) and how much cam duration (254�/260� @ 0.050") is needed to make 738 HP/666 TQ based on a Gen. VI 502 short-block (GMPP p/n 24502619)- an engine w/a lot larger bore diameter and a 4" stroke (giving less piston speed) than an engine based on a BBC 427 TD.
If you lower the power expectations by at least a hundred or so, things will become much more "doable", IMO.
Wow Cobalt, thanks for posting that Article, I have been searching for builds like that, as I am building a 540 w/AFR 315's (with a Gen VI Block)-my Cam is close to those figures, so this gives me more material to day dream about-
sorry to hi-jack this Thread-
To the OP, I am waiting for the Heads from AFR now (ordered about 5 weeks ago), and used 2.25" valves and PAC Springs-I started out building a 496 for the street, bought some Edelbrock Heads (290cc w/2.19") and realized I wanted more-those Heads you have can build power though-I have a friend who gets big power out of them, and goes 2.25"-