I'm also trying the 2002 board. M10 block, E12 head, piano top pistons. Pulling to pieces this week and want to measure bores, journals, end play, etc. Bit of practice and so I can make informed decision on rebuilding or scraping. Have Haynes, but didn't see any listings for piano top pistons. Any info apreciated. thanks DOG '72 Touring 2002 '78 320 in pieces