Casting Numbers on Block?
Drifting
Joined: Mar 1999
Posts: 1,931
Likes: 1
From: Norcross GA
Le Mans Master
Joined: Mar 2002
Posts: 5,889
Likes: 2
From: Castro Valley Calif.
St. Jude Donor '03 thru '26
Mav, core shift/previous bore jobs are common issues with these blocks because they're siamesed to begin with and not very thick walled. A quickie check for core shift short of sonic checking is to look at the trueness of the cam bores in their bosses 
