The Stovebolt Site Forums The Shop Area The HiPo Shop exhaust manifold

Some of the later-model 305's had that offset bolt hole, but Goodson and several other rebuilders' supply vendors sell aadapter plates to convert those heads for use with either type of manifold. I bought one set of them, took some measurements, and now I make my own from 3/16" steel plate. Most of the manifolds have both sets of holes. It's the heads that have to be adapted.
Jerry