Ok I measured with some the best I could with some calipers and I do not get consistency among various blocks and pins..Unused holes seem about .368 and pin about .370 and then some pins are about .374 ...No wonder some will not come out..Standard non ford pin is .375..Just be very careful with this..A loose pin can easily be replaced but a cracked block ,well you know..
It sounds like you got this
For the knowledge base how about a pic of the rear of the block straight on. :thanks: