It depends on what you want to do and what your budget is. IMO, if you already have the 97 motor, and it is in good shape, use it. 350 is a decent deal on a termi block and crank, but your 97 will hold the turbo at 7-9psi and make better than 450 easy. Plus, the termi motor is an iron block, which is significantly heavier than the Teksid in your 97 motor. I'm not a fan of the termi block. If you do rings/bearings/gaskets and timing components on the 97, put a programmable boost controller on your turbo setup and few other basics, it will handle 12-14 psi under aggressive driving conditions. The cost you save using the 97 will pay for your turbo setup.