I got lucky on mine. I had my engine out and trial fitted the engine, 'bell, and starter. I had to grind the crap out of the block (World), install the big wire on the starter before mounting it, and had to massage the starter to fit the 'bell.

It would have been a real b!tch if the engine had been in the car. I am really tired of expensive parts that don't fit or need mods to work.