Just bought a 78 K5 that runs decent, but it has a worn-out two barrel carb. The motor runs okay, but will eventually need a rebuild. Should I go a head and buy an intake and a 4 barrel carb for it or would it be better to put a TBI 350 from an 89 suburban in it (how difficult is this). I can buy the suburban for $1500 and also use its front clip. Then part out the rest. The guy says the motor is perfect. What should I do?