TH350 rebuild advice

What should I expect to pay for a th350 non lockup rebuild? It will be behind a lightly built 350ci in a 77’ c-10 pickup, use for towing in the summer heat. I want it to last.

The price varies from region to region and from rural to urban. In northeast Mississippi I can get one rebuilt for less than $500. depending on the serviceability of the old components. That is a bench rebuild. I would do the R&R. None of the local rebuilders will bench repair for the walk in public.