AO Silver Member
Join Date: Aug 2004
Location: United Kingdom
Re: Alfasud T1 Gearboxes
As far as I'm aware, all boxes from all suds are interchangeable. It's only when you get to outboard braked Sprints, and 33s having electrical speedometers that things get awkward. Swapping a 4speed for a 5 speed is straightforward, but I would exchange the whole gearshift to be sure.
What you're proposing should be no problem, as long as the gear and final drive ratios suit what you want.