[MikeB]

FIA,

With your 3.73 rear, you would have to use the TKO600 that has the 2.87 first gear. Even with that, you may want a lower rear gearset. With the 3.27 first gear, you'll be shifting to 2nd at 10MPH - geared totally wrong for your rear end, so forget that.

I've never been a fan of Tremec and know many people who have grenaded their gearboxes. Just be careful - they say they're rated for 600 ft-lb, but it really depends on many variables.

Richmond is coming out with a 5 speed overdrive and I understand it will be unveiled at the SEMA show. You might want to check that out also - they usually have a nice selection of gears available for their products.