New Engine, Different Tranny???

Depends on the word"cheap". There is a slant 6 forum that gets into making the 225's run, there is a guy that turbocharged his fairly cheap. For starters, it would probobly be fairly cheap to swap that 198 for a 225 if you want to stick with the 6. I am swapping the 225 out of mine for a small block, you can do it cheap and have good results. Even a mild 318 would be a huge improvement over the 225.