Best year for a 318 build?

Nice score! Sonic testing on a few of the early 318s show capability for a 4 inch bore. Some have forged cranks but I'm not sure if that's a truck only deal (the ones I know of are), or if certain pass car (police and taxi, maybe?) have them. If you have the wall thickness to be safe and wanted to go with the 4 inch bore 333 inch version, here's one of the pistons available. You would also be able to sell the high compression distance pistons you have to marginally offset some of your build costs.
SRP, SRP 345794 Pistons