Have the intake ports been enlarged? If not I would use a 68-70 stock intake and clean up casting flash. Separate the water x-over to line up ports better. Then check how well they line up. May need some extra clean up for good port match. The RPM intake has larger RAIV port size. And need a drop base air cleaner if you use one. 76-79 Q-jets are my fav's do to the APT circuit. HEI wont get you more power vs points. But the hotter spark is better for tuff clean idle(fuel drop'n out of suspension) on some builds.
BTY, lets us know how you like the RAIV cam with 3.36's. I have RAIV with 3.42's and its slow off the line. Even w/a 3500 stall convtr. At least compared to the last one with 3.73s.
