What is the general concensus here on the best shift kits for the F-150's? I have a '94 4x2 w/the 5.8 engine and have just installed a set of 4:56 gears. (I have a 6"lift and 32"tires)..

The performance gain isnt exactly what I had hoped for and i'm thinking the weak link just may be the tranny (although its been totally rebuilt, TC included)

Anyhow, i'm thinking a shift kit might help improve things (I also tow a 6040lb TT once inawhile)