What do I need and what do I don’t!

Depending on when your 75 was made, it might still have some remnants of the 74 seat belt interlock system that was a one year disaster. If yours was an early build (August, September or October) 1975 then it likely still has wires for it.

Post up some pictures of your engine bay and your Scamp!!! I’m partial to the 75’s too.