Nothing simple about them except the concept. To make the transaxle reliable a number of precision operations need to be done. Even then the torque from a 350 SBC can break the transaxle if you drop the clutch fast. Sadly most are going to newer transaxles and bigger engines so a "real" Crown V8 will probably become scarce in the future. A good setup is to use a HI-PO 283 or 302 Z SBC, big car Saginaw input shaft, four spider differential, and a few other mods and don't do any "burn outs".
Check out their site - http://www.v8registry.com/
If you really want a Crown V8, then you can find some rough and "never got it done" cars around. Expect to sink a lot of $$$$ to get one done correctly. If you don't have good mechanical skills then you must rely on experts = $$$$$$$
Best to get with it, a lot of the Crown V8 experts are not getting any younger.
If you want a mid engine go fast Corvair there are other options like using a Porsche transaxle.
I have the transaxle input/shaft/bearing and trans mount pieces , do not have the cradle, i haven't looked at that stuff in a long time, but might have the shift rod
pm or call me
With that said, I think Clark's has ONE Crown Sub Frame left to sell. Unfortunately I think they sold the last of their other parts a couple of years ago.
1965 Monza Coupe
Mid Engine enthusiast &
Prior Kelmark Owner
https://spokane.craigslist.org/cto/d/19 ... 01474.html
1968 140 Monza convertible 4 speed
1965 Corsa Convertible
1966 Crown V8 383 435hp
1986 Buick GN V6 600hp