Anyone know if the stock piston in a 525 is dished or what to get the 7.5 compression? Going to put rollers in them and wanted to know my options as far as lift goes. Any help would be awesome thanks!

I don’t think they make a std core bbc cam big enough to hit.

Do you know if it's a flat top piston in that motor?

Pretty sure it’s dished.

I was wondering what they would have had to do to get the compression down without a dish. That would be one thick head gasket.

Thanks that's a big help!

Like griff said the 731 cam is excellent upgrade for 525. The only time I ran into a clearance issue was with a cam I had initially wanted to advance, 454 with stock mag pistons. It was either flycut the pistons etc or install straight up. .600 lift cam with 2.300 valve - dart heads decked .025. You have stock heads with 2.19 int. With dial indicator and valve compressor you could carefully check at full lift with your current cam although shoukd use a solid lifter when checking if you so choose to do however I see no clearance issues. Be careful what cam you choose. Valve timing is crucial.