New toy - some assembly required!

I recently purchased a 1965 Allis Chalmers 190.  It has wide front, is a diesel, and has the snap coupler hitch instead of the three point.   I was lucky enough to get the original grill as well, although its going to take a little work to get it back in shape (it fell off while the tractor was working).  Its in good shape, but after trying to get it started the engine just siezed up.  It was turning over fine, and then just locked up.  I could turn it about a 1/8 turn either direction by hand though.  Turns out that mice had packed the exhaust manifold full of acorns and when we tried to start it they were sucked/fell into the cylinders and locked it up.  Luckily no damage resulted.  So now I am in the process of rebuilding the top end.  Let me know what you think.

Really its not as bad as it looks.  Dust just makes it look really faded.  Also the front tires are not correct, but I think I know where a set of correct rims are.

Believe it or not, that front step may be AC.  It is actually a support stand for AC cornheads when they were shipped from LaPorte, IN.  We used to have them laying around Dad's dealership by the dozens.  Some guys liked the wider base instead of the smaller step that was OAEM.  Also there were some One-Ninety's that did have the short profile five-rib tires like those shown.  FWIW.

Brian F(IL)