from the picture you obviously went with a different gearing in your rear end also?
not the gearing itself but what did the donor come out of?
because they were used in many variations in many different variety of vehicles the motor itself can be alot of variants in design as well as your tranny and rearend
i have the least desirable but have dealt with it while making plans for upgrade?
you dont open up a piece of equipment or car,truck, bus, or anything unless you know what you are getting into?
ah hell that rant might work with mechanical but who in the world knows what each companies engineers think for that part?
sorryOP i lost track but we still need to know what rearend you are workiing on to be able to help