this is my 1995 c1500 originally came with a 305 tbi & nv3500, blew the 305 swapped in 454 out of a 1994 C3500 cab and chasis truck (i paid 2k for the whole 3500) was told it has 60k miles on a crate engine but i still rebuilt it with 750 cfm holley brawler carb & msd ignition performance intake...