Why buy a Delco, grind the case up to fit, have to fab new mounts, change belt size, and cut the stock wireing harness when all you have to do is bolt on a Bosche alternater for a 1980 Ford Fiesta? It's a direct, bolt on swap, no mods needed at all, just plugs in, and you can always go back to Lucas on the side of the road in less than 5 minutes time. Delco is a good alt but I don't see going to the extra work if all you want is an alt that puts out more amps and is more reliable than the Lucas.