Plastic inlet or metal into alloy.
Looks like a classic 3.5
Post type sprag starter and provision for the bail bar brake at the back.
Old type 3.5 carb, an electronic coil and a starter off an old 3 or 3.5Hp and that will go. Well it will, id be ripping the head off and checking the bore out before making the call on throwing it.
Compare the head gasket to see if its not a 92 or 95. 10 series is a different bolt pattern.
Bob.