Can't find a thread specifically about this, so here goes...
I am hoping to improve my 89 1.7 340 with a fuel injection set up, and would like to know if the B18EP engine from a 480 is a relatively straightforward swap?
Any thoughts on what's involved/what parts I would need/what the pitfalls might be?

You could also consider the B20F

Like this one?

No that is a B200E or B230E from a 240

The B20F was found in 440/460/480 models. Looks exactly like a 340 1.7 from the outside