Take te cv's and axles off. I ran on idle my GTM (successfully) with wheels on but... The oil friction in the transaxle caused the wheels to rotate. I applied the e brake and wheel rotation stopped, all was good. I believe your axles would try to rotate but no real power transmission unless...
Your intake routing is similar to mine. What ID is that flex tubing?
I will be using the area to the left side of the fuel tank (typically where fuel filters go) as my air filter chamber. I'll show pics when I can get out to the workshop again.
A Porsche G96 gearbox weighs approximately 175 lbs according to the CMS website. Does the new Vette twin clutch really weigh in the neighborhood of 675lbs? If the twin clutch came in at 300lbs you would only be gaining 125lbs.