I just bought this truck from a guy he said it only had 1000 miles on the rebuilt 454 bored 30 over and mild cam I asked for more but he didn't have his cam card any more so that's it. It was backfiring through the carb bad so I plugged some vacuum leaks replaced the 750 holly with a edlebrock...
I just got my first big block its in a 78 GMC K15 short bed its my second square body GM my first was a 77 K5 blazer with a 320 hp crate engine and 35" BFG MTR's I've wanted a 454 sense I was 16 took me 15 years but I finally got one