mtrain
+1y
Yes I think you would be very unhappy with the C6. I think you should be able to sell it for about twice what you could get a C4.
And, like I said I can talk you though rebuilding a C4 as you don't really have to pull every single thing out, just the clutch packs, and change the shift bands, plus a few other cheap tricks that I will tell you only in a private message.
One other thing you are missing as well and that is a big loss of gas mileage with the C6. I know this may be a moot point, but every little bit you can save will make the truck more fun to drive and enjoy.
Also, on the C4 DON'T get one made before 1969 as it has the 24 spline input shaft vs the 26 spline found in all later C4's.