There can be variances withing the same brand too, so you're just going to have to measure the clearance and go from there.
Rods are measured center to center. Probe makes a piston for the 4.300/6.700 combo, so that's probably what you have. You might be better off selling the rods and pistons you have and replacing both vs. having a custom piston made.
Rods are measured center to center. Probe makes a piston for the 4.300/6.700 combo, so that's probably what you have. You might be better off selling the rods and pistons you have and replacing both vs. having a custom piston made.