first off, that thing is gonna be a slow, heavy boat.
Second, I wouldn't buy ANY car, much less a sportscar, with serious powertrain issues.
Thirdly, under no circumstances should your buddy buy a tempermental high-milage car.... I know first hand. My supra was the bane of my existance for two years until I sold the bitch. You'll just keep having problems.
And finally, that car is gonna be a slow, heavy boat. Wait, did I mention that already?
...not to mention unfavorable insurance rates.