This is an oops! moment. Didn't see the words "sonic check" anywhere in your posts. Before I bought pistons I'd check and make sure your block is going to hold up. Better to waste the block prep money than to waste block prep AND piston money!

If you're spending $400 or more on run-of-the-mill pistons, throw another couple of hundred in the pot and you can get a semi custom piston that fits your needs. Diamond comes to mind. It usually doesn't cost a lot to make a simple change to a shelf stock piston.

To look at a lot at once, try www.flatlanderracing.com or www.campbellenterprises.com.

For example, I found that Probe and KB make 440 pistons in 0.060 over.

Then I'd suggest buying from a board member who is a dealer.

R.