Pics would definitely help, hope it was stored indoors for the last 20 years. With no info I would think at least $3K but could be worth up to $15K depending on condition and the parts it has with it. If the 929 radiator is still there and not too damaged, the 893 oil pan is there, and of course the exhaust manifold, Inland shifter and all linkage, and the rest of the hard-to-find parts are there then the price goes up.