240 General: B21A to B200F Block swap

[a1ned]

HI Guy
Just curious I have a 1984 240 that has been fitted with a fuel injected 93 B200F oil squirt etc engine, the whole lot,wiring loom, self diagnostics unit etc from a completely rotted out 93 Torslanda a couple of years back,

My question is this, the original engine came with the car (B21A carb model 1984) can I mate the original block to the 93 engine.

Purely Because I would like to put the original block back in but retain all the good bits from the 93 engine like the fuel injection system fuel injection head, oil squirters etc,

obviously this would entail a complete rebuild an awful lot of expense but it's not about economics as I would enjoy the challenge and the excuse to spend more time in the shed away from the family.

Please forgive my Naivety in asking the question as I'm sure that a 93 head on an old 84 block will not work as they must've changed the bolt pattern or something in that time

Regards Ned