Rich, I just realized I didn't answer all you questions... Turn around time varies with how busy Rebello is, like just before the Nationals, they are really busy. Mine took about 4 months, but I gave them a target date based on when my chassis would be ready. I'm going with the original 4-speed and diff, but may install a 5-speed set-up in a few years for better highway driving. Mine ran about $3800, but varies depending on what you have done and the condition of your carbs, head, etc. There are also some options for compression ratio, cam, carburation dyno tune, etc. Your best bet is to call Dave Rebello and have a short conversation with him. Define what your usage will be, (mostly street, autocross, track), and let him help you decide what the best package would be. Also, above 225 HP, you might want to add some additional frame welds / stiffeners to handle the extra HP.