I think it'll be 6 of one, half dozen of the other as far as cost goes initially. 465/205 is a $250 combo tops. However, going hydro clutch right away would be best which is going to drive the cost up a bit. A hydro set-up is gonna run another $150 or so and then there is the master and slave which should be new for peace of mind.
Flywheel, clutch and pressure plate will run another $500 (high side, but probably a good number for budgeting)
Drivelines will need lengthening and shortening, probably another $250.
My 6.2 hums along at ~2600 rpm on the highway and still returns 16.5 mpg on bias TSL's. 2350 on radials is going to be decent enough IMO.
Frankly I'd donate my 465/205 to the cause including bellhousing, but firstly i still need it until late July and secondly it's a mechanical clutch bell. Hell, I'd throw in my driveshafts too, although the rear one does need balancing.
Rene