What kind of problems might I run into if I were to pull a TBI 454 out of an 89 R30 (2wd 1 ton) and put it in My 78 K5. I would swap over the front wrap wiring harness, gauge cluster, stering coulum, power windows and locks. Basicly I would rip all the original harness out and make it an 89. I know I would need an EFI fuel pump in the tank. Oh and smog is not an issue for me.