I wouldn't do it and I got 2 sitting in my garage. The only reason that will even cross my mind is if I found a cheap chassis. It's about $10k for a 3.2 litre and 6 speed tranny and a little cheaper for a 3.0 and 5 speed. Say if it didn't have a motor I'll probably put $10k into the fabricating a K series/turbo into the chassis I might consider doing. If the NSX has a motor already it'll cost $10k for a lovefab kit (450 WHP) or $8k HP kit (600 WHP) to make an NSX a 10 second 1/4 dragster and a great track car. Overall you will not be able to sell a K20 NSX the same price as a stock NSX.