[AT] Allis HD5 engine problem

[Grant Brians]

I need a replacement engine block on our HD5 Allis-Chalmers crawler tractor.
It has a Detroit Diesel 2-71 engine. John Parks has a motor that would need
rebuild available, but I wanted to check the list to see if anyone has a
motor or a line on one here in California or in Nevada or Arizona. If it
were in California (Northern or Southern) I could probably pick it up if I
find it quickly. Can anyone help? Those pesky cracks in head bolt bosses
definitely are unhelpful.
       We did run the tractor yesterday after determining there is a leak
still after fixing the head, but I can't count on it continuing to
operate.... Sadly I think I can say the block is NOT repairable given the
location of the crack.
          Grant Brians
          Hollister CA vegetable, fruit and nut farmer