Carb conversion for Gen6 454?

[Rede]

I've been trolling around the net for the past month on info for how to convert the Gen6 (96-up) Vortec 7400 to carb for use in my early 80's pickup.

I bought a complete motor for 750 beans that is complete minus accesories and the engine wiring harness (but I do have the PCM).
Basically, the owner swapped out this 454 for a 350 to gain mileage...they gained 3mpg.



Can someone shed some light along with an intake part number so I can physically see the proper intake port design?
I've been told to just get an oval port intake like a performer, torker 2.0 or Airgap 2.0 but if I buy the wrong intake, I can't take it back.


I aslo need to know which flexplate I'll need to bolt this motor to the Turbo400 I plan to run behind it and what to do for accesories...
Can I reuse all my 80's engine accesories from my old motor, or do I need to buy all the 99-ish accessories and go to the serpenine setup?





I found a guy who has a new 502 with factory intake, cam and all the valve train for sale for 500 bucks (which I've been told that the 502 cam is a nice upgrade) but I don't know if its a dirrect swap or not... so I told him I'd try to get some answers before taking the plunge.



Truck will be a winter DD for driving around town/trail/mud toy.
Mileage isn't a large concern as I'm never going very far, but reliablity, winter driveability in the middle of winter are my biggest concerns.


I'm not opposed to going EFI, I'm just trying to keep the build simple and cheap as this truck has been bleeding me dry since I bought it.
I just want to get it running and work out the kinks/bugs before I'm depending on it in the middle of -45C during the winter.