Is anyone running this combo? How does it work for you? What would you change? (feel free to PM me if you don't want to discuss details on an open forum)

Based on my most common track this combo with a 3.27 gear works well (geared to avoid 5th completely). I'm venturing to other tracks and am finding I'm between gears often AND need the additional pull a 3.90-4.10 would provide. When I started racing the car I was the only 4.6, now several guys are running them. They all have T-3650's and some are using a .82 5th (with 3.90/4.10).

I'm considering switching however I have a 4 weekend old built T45 AND a matching never installed spare T45 both built by the T45source.com. These have upgraded shift forks, and other parts since we discussed how gears get "slammed" vs street car use. Any value to these? Switching to the T3650 will cost quite a bit more than the T45 did originally.