I agree with the carb intake with an adapter, much cheaper and no real loss if any. Personally I put vortec heads on the 350 from my '79 c20 so I stayed with a hydraulic flat tappet cam. I did nothing to the heads, they were remanufactured to "factory" specs, I put a lunati voodoo cam in it and it paired quite nicely. Estinated power is 330hp/440ftlbs of torque, but honestly that was with desktop dyno 2003 which is not very accurate and also favors comp cams. Now the engine I built has a 9.8:1 compression ratio and I used an edelbrock performer intake. Overall it runs great with lots of bottom end and midrange torque without a stall and with 3.42:1 rear end. If you have lower gears like 4.10:1 you can get away with a bigger cam, just be mindful of the lift as factory vortecs allow about .470 for lift if you're lucky. Over all it turned out to be a great street truck and gets going surprisingly quick. The cam jr mentioned is about as big as the vortecs would support really well, but does require a lower gear and a 2500+ stall converter and may require headwork to the vortecs. Also, with a hyraulic roller you can usually get away with more duration from what I've been told.
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