I've got a 307 block that I am disassembling to inspect, and considering using it in another project, don't even start with the 307 block I know exactly what I got. anyway - here's the scoop. this thing is / was rusted from years outside without being covered properly. I had a real hard time getting the pistons out, the rod caps, and the crank. I ended up using a sledge to get the stuff out. well, other things are real hard anyway, and evidently my rod end got caught on the inside lip of a couple pistons. it chipped a piece about a quarter of an inch deep on the lip of 2 pistons. is this block ruined? can it be used as is, and if not can it be sleaved? what are the implications of sleaving a block?