FWIW, if you are just starting this project, I would make sure the car is jam up first. Do the brakes, clutch, any maintenance items. then go with the handling stuff. All of that is relatively inexpensive and makes for a great DD. Then,I'd work on the long term project things like turbos and blowers.
As an example, what is your budget? Decide that, then decide how much repair/ maintenance stuff will be. Once it is up and running dependably, then see how much you have left to spend and be reasonable, putting a blower on an engine with 250K doesn't make any sense. Fix the motor first.