Have you raced the truck with the built 70E or are you still refraining? It looks like a nice build and I totally agree with keeping the AWD in both trucks (Trailblazer, Typhoon). How many miles on your built 70E?
In retrospect, my 65E wasn't built right either time but putting an 85E in my 2wd truck was relatively easy so I have no regrets except that I spent a bunch of money on the 65E, didn't find the right builder and didn't do enough homework on my own (relied to heavily on the builder).
Total miles are pretty low; it sits most of the time. Sad face. Also zero racing. Sadder face.
But when I do get in it - I make sure to give it the beans. Happy face.
Lots of risk in this hobby, and people who will betray your trust for a buck.