Under the starting engine clutch and pinion levers on the LH side while in the driving position of the tractor there will be a raised boss that you need to have machined out. There is also 3 holes surrounding that boss that need to be drilled and threaded to accommodate the starter as well.
The plate on the RH side of the tractor with two 3/8" threaded holes is for the timing marks on the flywheel and greasing the main clutch pilot bearing.
Thanks CR. Quite the hellish position. If the skinned knuckles don't get me the snakes sleeping under there will. Can I assume to remove that bell housing the whole tractor needs separation , not just removing the pony and pulling it rearwards.
That reminds me of years ago I got a road call at the Cat dealer from a customer to go repair an HT4 loader at a town sanitary land fill and I had to chase the rats out of the belly pan before I could work on it.Boy that was a smelly job to deal with too.We used to get garbage trucks into the dealer shop for repairs and they would stink up the whole building from the smell and was good to get it out of the shop as soon as it was repaired.