[Captainfab]

Yes it is totally doable....it's done all the time. As already mentioned, you'll need a intake specifically for the Vortec heads. As for the distributor, any Chevy V8 distributor will work. However, you'll need to make sure that the distributor gear is compatable with the roller cam. It's of a different composition than a standard gear. I believe you can take the gear off of the original distributor and install it on another OEM distributor such as a HEI. A lot of aftermarket distributors have slightly larger shafts. The timing cover can be swapped for an early steel one, of course you'll need the correct timing pointer. As for removing the reluctor ring between the balancer and timing gear, that is fine. But the original balancer has a shorter hub to account for it's thickness. So a switch to an earlier balancer may be necessary. What bradh did should work also. And yes you will need to run a electric fuel pump.