My grand father gave me a 55 lst series 3/4 GMC. It is the truck he and I Semi resorted when I was in highschool. We painted it swaped in a 1/2ton axle (w 54 chevy car drums) and a car rear axle (70s buick). I have always liked the truck and want to swap in a V8 or a hot jimmy. The truck has a good running 248 and I wondered if it has some hop up portential or not. I am thinking more the hot rod power tour not the drags (doing that in a 80 camaro with a 427). All I see are 270s or 302s. I thought about swaping one in but it runs well this way. Are after market pistons avalible or other internals. Are the heads on 248s junk if so what head is good and will work. If it goes good I even thought of a 2 t.b.i.s on a 2 port intake so to prevent jet changes on the power tour. Just want suggestions for now.
