Anyone Used Turbo Action 17805S?

I'm also thinking about that one. Not sure if I want the Tight or the Medium. Turbo Action recommends the medium on their web site. This is my combo:

1970 duster
1965 - 273 commando
Cam: Comp Cams Magnum 282S - 282/282 Lift 495/495 (solid) Beehive Springs
Edelbrock D4B intake / Holley 670 Street Avenger
Pertronix Ignitor II & Flame Thrower coil
Hooker Headers
2.5" Dual Exhaust / Super 44 Flowmaster
8 3/4 - 3.55 - SureGrip
727 auto / Shift Kit
B&M Quicksilver Shifter