[Woodz428]

Unless you are required by rules to have early casting #'s, and since you just said "close to original LOOKING", I would get a 5.0 roller motor and set a 289 reciprocating assembly ( of stock or aftermarket components). If you wanted stock early head, they are readily available used. I have a '66 set as well as some 351W '70 heads. Early heads aren't the best for performance so they don't draw high dollar, except the Hi-Po heads and they have no flow advantage. If that isn't a problem the 5.0 heads can also be used and there seems to be many suppliers for the other parts you need in the aftermarket.