Opinion on Clifford mods for Slant 6 motors

Darter6 said

They tranny freshened look at spending $600 to $1000 (Depends on your area) The 904 is a stout tranny. A good converter another $600 or so.The rear is again what the price is in your location and gear ratio depends on the terrain you drive in your area.Local roads,hilly,or open highway.
All this also depends on how much of the work you will be doing yourself.

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Part of the allure of this possible project is that it's not very expensive and I'm looking to go through something from top to bottom, so I would say almost everything with the exception of actually rebuilding the trans I would at least try to do myself. I've been told that the 904 though is actually the easiest to rebuild so who knows, I may actually even give that a shot, worst case scenario, I box it up and truck it down to a transmission shop and say here you go!