70aarcuda said take 1/2 the stroke...3.31/2=1.655 plus rod length 6.123 plus the compression height of the piston...1.72 as noted in 1st post... 1.655 + 6.123 + 1.72 = 9.498..... so if the block is at 9.60....your pistons will be down .102 in the hole Click to expand...