Originally Posted by Cab_Burge
I'm having interference problems between the bottom of the pistons and the crank counter weights on my Ford 351W stroker motor I'm building

Cab,
The counterweights may only need a little clearancing at the counterweight directly opposite the rod journal. See my pic earlier in this topic that shows the Callies factory counterweight shape. It is "cam cut" to leave metal on the counterweights, but clear the piston pin boss.