318/360 heads,with thumper cam

I once put 10.5 pistons in a 318 and had trouble with it overheating due to the high compression. I then swapped a set of 77 360 heads with the 10.5 pistons and was down to 9.2 and no more overheating. It ran great.

So basically, if you run 10.5 318 pistons and put 360 headw on them, you can get to a reasonable 9.2 compression without having to mill the block or heads.