516 heads?? Not sure when the 516's came out.....not even familiar with the Sonoramic Commando 383Looking for early closed chamber heads for my 1961 Sonoramic Commando 383. In lower Alabama. Prefer pickup 3-4 hours away. FL/LA/MS/GA. Thx.
Of course the real question is....are you running a generator or a alternator?
59-61 heads are for generator...which mounts off the exhaust manifold...heads are not set up for alternator.
62 and up heads are set up for alternator.