[quote:1g2mesp8]Yes they have the big soft plugs on the side like a 60 and there are 2 different castings for those old style blocks. The prototype 88 models have a block like a 60 in that the flange for the starter was cast on the block. John[/quote:1g2mesp8] Now do I look for a old block [may have a lead on one] or just use the one that came with it? To further confuse the issue it ended life before restoration started as a  .....diesel?  First diesels 1949?  I think its a later block than tractor . Can't ask the owner as he passed away.  Lot of  changes could have happened in last 55 years!!!