If your plains are to use a Blower Of any kind or even a turbo. The 307 pistons would not work You'd have to much compression because they are a flat top. So you'd have to use the stock 250 piston or one with a Lower compression. the stock
250 piston is 8.5-1 which can or may Limit how much boost you can run. 7-1 was or is More prefered. And it lets you run more boost.
God doesn't like ugly.
