need your help for my bristol 411

The 383 is a high torque engine, even the factory High Performance engine. It sounds like the Overdrive speed is programmable. I have a 1968 383 727 Formula S Barracuda that was basically stock High Performance that I drove as a daily driver for years. I used to swap 2.76 gears with 235 60 14 tires in for long trips. It never slowed down much going up hills. As long as you have the money and it physically fits it sounds like a great way to go. The top speed would also be amazing.

http://www.gearvendors.com/hrdodge3s.html

http://bristol411.co.uk/