Cab I have looked at doing a hemi swap many times. You are in for at least 2k just for manifold/carb/ignition or a/m holley set up to run factory fuel ignition.

If it is a newer engine with the active runner intake you would be giving up too much power to go to a carb set up imo.

There is nothing cheap about a hemi retrofit. If and when Holley comes out with a controller that will handle the 8spd trans as well then I will likely take the plunge.