Is this the project in question?:
https://www.racecarsdirect.com/Adver...rame-by-kirkha
As the others had stated, this could go well past $150K.
You mentioned that only Superformance and Backdraft are within budget. There are a couple CSX4000s on the market at the moment under $120K. They are used but these cars for the most part have a pampered life with low miles and meticulous upkeep, plus the build issues have been worked out.
Cheers