I just joined ACMOC and am looking forward to interfacing with other Cat owners. I'm presently restoring a D2 5U12142 that I rescued from a farm in upstate NY. Its a solid machine with 4000 hrs. The farmer I got it from left it outside without the stack covered so I did a valve job and am presently doing the rings. I got the pony running fine so but it would not start from lack of compression due to stuck rings.