small block and th350 combo

[elorenzof]

I recently purchased a 1999 silverado that i want to pull the engine and trans combo and put it in my 1970 c10. my current engine, is a 5.0 litre with a th350 combo runs great. i use it every week. the engine does smoke upon initial startup but that is it. (valve seals hardened) I have approx 80k miles on this engine, as it is not the original. what would this combo be worth? Once i pull it out i will put it up for sale. Here are a couple of pics.