Just wondering if anyone has done this?

Hear me out, reason I ask is there is a Very cheap low mileage Engine and transmission from a Salvage car with wiring ancillary's available. So Im wondering if it would be a simple case of pulling out the Gen II engine and trans and fitting in the Gen 3 for added Fun?

Are the engine mounts the same, would there be any issue with engine height (fitting under a gen II hood and window cowl)
Would the wiring be an issue to get it to work with the rest of the gen II stuff?