It does not have the original engine. Looks to be a 1972 350 with hei and 4bbl from a '78. Exhaust manifolds I'd guess are original as I've never seen any like these before with front cross over but the RH manifold is shot. Has correct short waterpump, late model 12V alternator(improperly shimmed). My guess is original 4sp and 2sp rear axle.
Pic of truck on way home, getting off loaded and test fitting a bench seat from a regular cab S10.
