I am in the process of an engine swap in my 92 Chevy C1500 and I have 3 questions. Question 1, I am using an early 80's block and early 70's head combo that I had laying around, and now I am to the intake manifold install part. I want to keep this truck TBI, and I have been planning on using an Edelbrock Performer TBI intake (part# edl-3704) but I was told the head to intake mating surfaces on the TBI intake and the older heads are cut at different degrees, and will have a vacuum leak if I put these together. I have set my stock intake on the engine and it appears to line up fine. Has anyone ran into a problem with this before? My 2nd question is I am planning on running an older style long water pump with v-belt accessories and brackets, instead of the hideous cast aluminum brackets and serpentine setup. Since the serpentine water pump runs counter clockwise and the older water pump runs clockwise, is this going to cause any problems with the plumbing of the intake manifold? Question 3, Do I route the heater core return line to the water pump like the older water pump, or to the radiator like the TBI cooling system is designed for? Thank You and Happy New Years!