470 Head modification help

[cfelton]

Dont know about an alum head, but I recently rebuilt my 470 because the head rusted out on top of the 3&4th exhaust port to manifold. I bought a rebuilt head from Clearwater cylinder head co . in clearwater FL. It cost 320.00 plus 20.00 shipping and have been very satisfied with it. Check em out on ebay, they usually have a listing.