70 340 4 speed worth?????

I bought a 2 70 Dusters. Both 340 cars. First one 340 Auto, NO engine or trans. Second one 340 4 speed, engine and trans intact. Has HP manifolds, correct air cleaner. Engine runs , No smoke. Both cars are rusted beyond repair, So parts cars. Any way what do you think the 340 4 speed set up is worth..Trying to figure it out???