I picked up a 98 TBS with a cracked/broken crankcase. The upside is that I have an engine/transmission for a TB that I bought at auctions, sitting in the garage. I want to take the 6 speed transmission from the TBS unit and put into the TB unit. The "cooling fins" are damaged on the TB unit, so I'd like to also swap the head from the TBS. What components would you replace, keep, also swap, etc. in order to produce the most reliable unit from the two. Anything to watch out for? What could be done to improve power significantly while I'm in there?