02-20-2003, 09:24:00 PM
Im having trouble figuring out the date codes on a block i have. Its a 3970010 4 bolt main block, I cant find any date codes on the flywheel flange, the only #s i see that can be dates are on the right side(In the middle, between the frost plugs) they are 1 K 26. I always thought the last # is the year, but a 26? Any help would be appreciated.