[WarrenG]

I've got an ERA FIA with the Tremec TKO 600 5 spd. I'm running a 1965 289 stroked to 331 and the ERA jag rear with 3.54 gears.

Quite a few guys told me that the 5th gear would be useless here in the DC metro area but I'm glad I got it. It does provide a lower noise level in the 60-70 mph range and even with only 390HP and 360ft-lbs I don't have any trouble accelerating for passing in 5th.

I have no idea if it gives better gas mileage, I think I've got a mental blockage in that area since I keep "forgetting" to record my odometer reading when I fill the tank!

I think if I was to do it all over again I'd go with the same tranny, but I'd probably go with the 3.77 gears for a little more punch when I'm in 5th on the beltway. I'd also consider the Richmond 5spd with an appropriate set of rear gears.