Quarter Mile Gear Selection
I'm not real smart on all of this stuff, but based on what you said about fun, retirement and bracket racing in the 1/4 mile VS 1/8th, I'd lean towards the most consistent ET setup you can get while making sure you don't blow it all to Hell. -More time at the strip and less time and money on rebuilding broken stuff. With all that torque, I'd think 3.91 or 4.10 gears would be the sweet spot. But like I said, I ain't schooled in racing.
Sounds like a great retirement though!