65 barracuda engine swap

On my engine, wierd thing is the engine ran sorta ok. When I broke it down I found the cam is no good, both heads are cracked, #4 cylinder has a deep rust gouge, don't know how that happened, as there was no leakage. And the #1 journal on the crank has a ding in it. So... i can't find 40 over pistons, 30 over are more than 600, have to buy 2 heads, I haven't looked at those yet, so... a 318 might be how to go.