I have a 69 521 with a J13 engine. I'm trying to use it as my daily commuter and it's a bit low geared as well as the clutch slipping, in addition to the rear main leaking like a sieve.
I can pick up a L18/5 speed combo out of a 620 for less than the cost of a new clutch, which I think is the way to go. Before I do that though, I need to make sure that it's going to be a simple bolt in, or at least need to be aware of the required changes.
Are the mounts different? Wiring? Since the L series was optional I have to assume it's close to a bolt in. I would appreciate any input.
As a side note, I'd love to do a KA24 and 5 speed from an S13, but I know that's more involved than I have time for right now.