What's it worth??

[kwmech]

Have a customers truck that has been here for about 4 years now. He is finally guessing he doesn't have the money to fix. 1985 short bed 4x. Currently has a 6.2 turbo diesel in it that for some reason has oil in the cooling system that made it's way into the heater core, so yeah it's kinda gooey. I'm figuring a blown head gasket or cracked head. Anyways over the years it has received a 14b full float rear, dana 44 front, Turbo 400 with a 241 with a fixed yoke rear, 3.21 gearing (yes that's correct) I think the rear has a detroit. Needs interior work. Body itself is in good shape. At this point I would put a gas engine in it and replace the heater core. Sell it complete or part it??