[Woodz428]

I'm surprised to hear that Summit doesn't carry one. Ford Racing offers a couple of stroker assemblies as do many of the Mustang Hi.Per. shops. I think the most common in a stock block would be about 393-396 inches. The 4V head talk would have to be regarding a Cleveland, Windsors only came with 4V heads in the first and maybe the second year of production, and they wasn't any difference performance wise. Any aftermarket head will likely outflow even a tricked out stock set and for less money. By the time you add up the valves, springs and machine work on a stock set a pair of aftermarket heads look pretty reasonable.