So here's what I have so far:
R33 GT-R Turbo which after research turns out to be a Garrett GT28
Miata 1.8L purple injectors
1.8L Mazdaspeed Miata clutch
1.8L XTD lightweight flywheel
I got an awesome hookup on the clutch and a 1.8 clutch will work on the 1.6, plus it's more stout. The problem is, you need a 1.8L flywheel and a stock 1.8L flywheel is heavier than the 1.6. I got lucky though and picked up the lightweight flywheel for $65 shipped.
So current total investment is about $200 with the parts above. Am I winning so far?
The car just got a new timing belt and tensioners, water pump, cam and crank seals, and thermostat housing two weeks ago. Then new brakes all the way around last weekend. So the engine should be solid and ready for boost once I gather everything.