if you put an A833 in your D300 it'll work nicely and put the shifter in a nice spot compared to the stock OD 4 speed shifter.


of the 17 or so Big block D100/150s I built over the years 10 of them had a V gates in them, it was the best way to deal with the awkward location of the shifter with an A833.

On your 74 RR it'll put the handle about 3 inches behind the front edge of the seat,.....but you'll thrash the floor hump....forget any console
The only A body I've had a V gate in was a 70 Duster, I used a 69 B-body trans with a Modified trans cross member and fabed up a floor hump to work.