It will fit no problems. May need a scoop on the bonnet to fit the ring for the venturi gas ring etc, but shouldn't be an issue. As per your first question - "What should I do the to engine prior to fitting" My answer is - lube it up and make sure it fits where the sun doesn't shine I don't have any idea of what weight oil you should use for that (no prior experience), but I'm sure that by trial and error you'll find a blend that is just right. If you've done it enough before then you can switch to full synthetic, but most people wait for about the third oil change to make sure the rings are bedded in - am sure by now your ring is well worn so it shouldn't be an issue. Pics though - the forum loves pics Last issue you could face is the diff bushes - no matter what car you put the donk in - make sure u check out the bush