Quote:
Originally Posted by mgarblik
very early Pro Stock BBC based heads completely re-engineered by Pontiac and generically referred to as "Big Chief" heads. What some people don't realize is the basic BBC heads were so extensively modified and improved by Pontiac that they made at
least 6 different versions and different castings. None were directly compatible or interchangeable and different intake manifolds, every part of the valve train and the headers were different between versions. The heads Arnie needed were called
the "396" castings. Nearly impossible to find. Darin Morgan
thought he knew where a few sets were and expended.
considerable time trying to get a set for Arnie.
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This is a link for anyone wanting to see what the Pontiac Pro Stock heads looked like.
https://www.facebook.com/share/p/JJ4...ibextid=oFDknk
Kinda funny Pontiac had to make the Chevrolet head "right" for them. By today's standards they are valve lift limited and weak in the rocker arm mounting area.... Still capable of making a 1k plus naturally aspirated pretty easily. I remember these three versions:
427 head 460cc runner 18 degree
386 head 365cc runner 15 degree
385 head 420 cc runner 15 degree
I'm not familiar with the "396" but I'm thinking maybe the other three versions had the standard port locations but were similar to the above.
Pretty confident the engine Darin mentions in his video uses CV-juans