I guess it depends on your engine.
behind a 350, I liked my SM465 more than the TH350.
Temporarily, I'd put in the turbo hydro 350, be content, and rebuild your NV4500.
That's what I was doing, but after buying a nice dual friction clutch and SFI billet pressure plate for the 4500 swap, I decided to go with a 4L80E. Darn extra parts
