Don't know about the Speed Pro, but I did some calculations on what were advertised as 9.7:1 CR off-the-shelf 413 pistons a few years ago, based on the dimensions supplied, and came up with they were gonna be something like .080 below the top of the block at TDC.

Might be better to spend a few hundred $$$ on some custom pistons that actually fit like you want them to.