Hello All, i am working on my Father In Laws 3010 that they have owned for a very long time, but not from new. anyway. he spun a rod bearing on #2 and i have the engine balancer out so i can replace bushings in there. i was trying to see if i should do sleeves / pistons when i have it open, but i can NOT for the life of me match the measurements i am getting on pistons or insides of sleeves to the I & T manual dimensions. 3010 gas should have 4" sleeves the way it looks and 3010 diesel should have 4.25 bore, right? even 3020's should be 4.25 bore correct? well my pistons are stamped standard but they measure 4.18", what the heck and how can i find the dimensions for this thing or even find rings for it? i could just as well put rings in as i will be putting mains and rods in for sure, but what the heck pistons and sleeves do i have this motor? i thought i had wore out std sleeves but the piston measures accordingly, so they are apparently not wore out, but i don't know what to look for to get rings and dimensions for it. can any of you JD guys help me out please? thanks very much.