Does it matter? He obviously enjoyed it and surely that's the point of it. Zagato, for one, is held in high esteem by many, yet he produced some very questionable cars.
Regardless of what you think of the end result, he'd put a lot of effort into it and it appeared to be reasonable workmanship.
Have you seen the drag 500s at Santa Pod? They're amazing, though they'd probably make the 'purists' wince.