I've had a brief look at dropping an injected motor in, as Chi mentioned, in both car'd and injected guises.
The full on injected root raises alsorts of problems, not completely unsurmountable, but complicated. The "old style" tank has no provision for an injection pump, so this would need to be found a home. The ECU, ignition, FI system and loom need to be fitted and the airbox needs to take the throttles and bellmouths. The list goes on.
All are probably acheivable but time and £'s would soon mount up I guess.
Other than being told fitting carbs to the injection motor "is more trouble than it'd be worth", the main stumbling block I can see is the ignition.
The carb'd engine uses two pick ups and triggers off the flywheel. The injected motor uses the inductive pick up, ala all the FI motors and the ECU fires the coils.
This could be got around by using the flywheel off the early engine, but I don't believe it's that simple??? I'm sure the crank is different.
The motor Chi is chasing is a good buy for the money and I reckon the money saved will be more than enough for a few tweaks he has in mind to make it a nice little motor
Chi, do you really want some pictures posting up??????