i have a strange combination of parts on my toy that im building and i cant get the flywheel to mate to the starter motor?

i have a 1.8 CVH with a number of different flywheels and starters on a MT75 4x4 box from a 2.0 DOHC sierra

does the MT75 4x4 have a different starter to the MT75 FWD??

do the 4x4 engines have a different flywheel to the MT75 FWD?

i havent got a 4x4 starter or flywheel but i must have ever other ford ever made, no mater what i do the starters wont lock into the flywheel!!