[strath44]

yes +1 more on the above doing the maths and adding a safety margin budget wise on its not worth it.

I took on a similar project (granted not a 911 cab) and assumed the shifted wing cracked the windscreen but in the end it was a massive chassis twist mainly inner wing and strut turret and a/b pillar. Prob is modern cars absorb damage not withstand it and with a cab i'd want to be very sure it was going to be 100 percent!

These always look like a good deal because of the price and over time you'll get a great car but infact you're better waiting longer and saving for a nicer one!