74 340 Cuda! what should i do?

Wow, where to start? After setting that long a lot of things can happen. CHECK EVERYTHING. Brake hoses, lines, gas tank, lines, trans seals, ball joints, master cyl, wheel cyl, tires, EVERYTHING. The engine probably has at least 1 stuck valve and might have rings that don't want to move. With the engine I'd start by taking the plugs out and spraying lots of WD-40 in each hole. Pull the valve covers off and tap (tap not beat) all the valves to make sure they're not hung up. Do this with the piston down the hole so you don't hit the top with a valve. Turn it over by hand when you move from hole to hole tapping valves. Try to get it loosened up first. That should keep ya busy for a while. Hope this helps. Ray, one of the ***'s.