[rjpgh]

I finally got the MV motor apart and here are some numbers:

crank 6223
cam is solid lifter with only "J" stamped on the end
pistons are domed #3881456 (hard to see)
main bearing caps have cast number of 964
took off main cap #2 and bearing was marked GMM420 324E7 0006
rods are "bump" rods with 3/8 bolts
pushrods are 3/8 diameter
cam sprocket 3856356 with nylon teeth ring
dampener 880 060 GM13
oil filter mounting flange (canister type) 3915164
bores are pristine with absolutely no ridge and measure 4.092 to 4.094

engine internals look very good, probably since the car it came out of sat for many years.