Passon or Tremec TKO 5 speed gear box consideration.
Last I heard, there is a 2 year wait list for a Passon 5 speed.
A Gear Vendors .78 OD would give you 2457 RPM at 60. Pretty much a bolt on with a little wiring power and a switch plus since it adds length, you need to shorten your drive shaft.
Here they put one in the Road Kill Hemi Super Bee.