not sure on the bolt size,I go by socket size that fit the head of them
you will have 2 5/8 head bolts that go in to the lower holes from the front
one is captured behind the oil filter and the other is right next to a starter bolt
4 9/16 head bolts go in from the back around the bell housing
there is one more hole in the top middle that will be coverd up by the auto tranz but the manual bell housing would use it to make the 5th 9/16 bolt
i have a bucket full of bolts from mopars over the yrs,let me know and I will send a set to you
the starter will use a stud and nut/nut will be 11/16 IIRC... or 2 5/8 head bolts if it has been removed from the auto tranz bell housing
I have the flex plate to torque converter bolts as well if you need those 4 also