Originally Posted by gsr wannabe
Thought all b series manifolds were the same--Intake and exhaust
Oh hell no. There are three different intake manifold bolt patterns (PR3, PR4, and P72) and multiple different exhaust manfolds (though all B-series share the same exhaust side bolt pattern.)
As for the post about deck height, that doesn't make a difference. You can interchange PR3 and P72 heads at will, given the matching intake manifold.