Here is a set of heads I did for Brad Rezac recently. This is for his Stock Appearing Buick. For those that don't know a Buick 455 head is very hard to get to flow (big port bias and dog legged). The port walls are thin everywhere and are a big challenge to work with. Alot of guys are very happy to get them to flow in the 250-260 cfm range ported with Stage One valves (2.125 / 1.750). These took alot of R&D time to figure them out, some port molds, practice on a junk head, and some good trial and error. If my memory serves me right I got them to flow 285-290cfm. Here are some pics.
Valve Job on Stock 73' Buick 455 Castings:
Intake Port roughed in, bowls opened, guide tear dropped, guide shortened, and port bias completely altered:
Port widened, Short side radius work:
Finished Intake Port:
Intake Valve Unshrouded:
Brad's Buick @ MAM - Racing Tommy Tynan
Still some tuning that needs to be done yet but the E.T. keeps falling and that is what counts!
