8BA block---3.390 bore

[Walt Dupont--Me.]

Originally Posted by Bored&Stroked

I don't know, I figure they went to a 3 3/8 bore - 3.375, then probably another .010 . . . and then some clearance for forged pistons, then maybe a hone or two . . . maybe! LOL

I'd be very interested in knowing what a sonic test of the cylinder walls shows? My guess will be somewhere around .100.

Bored-Stroked got it about right. Its 4:30pm, just came in from the shop. I dyped the post this morning eating breakfast. I frigged around yesterday after noon about an half hour then it was supper time, my mind was"nt working very good, it don't seem work very fast lately, I thought in the middle of the night, cyl have quite alot of rust and I thought maybe it was bored 3 3/8 and cut the ridge and honed SO, I went in the shop this morning and install a two in.wire brush in electric drill and cleaned the cyl halfway down, did 2 cyl. miked middel of bore, 3.375 top 3.395 === 3/8 overbore with about ,020 tapper. I've run into this crap alot in my 60 years of building these things but with no ring ridge and rust my mind work untill I went to bed.Thanks guys. Walt