[Tx Firefighter]

I did a serpentine swap from a 4.3 V6 onto a 350. Everything was pretty much bolt on.

First, the support rods that came off the front brackets and went back to the intake manifold bolts on the V6 didn't line up with the bolts on the V8. I went to the dealer and bought the two V8 support rods and replaced the V6 ones. Problem solved.

Second, the 4.3 had a real thin harmonic balancer, the V8 had a normal thick one. The crank pulley off the V6 was much deeper to compensate for the thinness of the balancer. I had to buy a 350 lower pulley off a generic 88-94 full size truck with V8 and serpentine. It was much shallower because of the V8's normal thick balancer.

Everything else was bolt on deal. Keep in mind though, these were both TBI engines that I dealt with. I don't know how a TPI setup would complicate things.