My throttle body is just the 454 throttle body and blade, I'm using the 350 shaft in it so the linkage hooks up like stock.
Here's my current file. The file I posted earlier is stock except for the EGR, injectors, fan settings, and corrected speedo/shift points. This one drives better, but I still need to dial it back some more, but it's at least driveable.
3GNEC18R8XG208839 segment swap for fans & tires-6.ctz
1995 GMC 2500 SUBURBAN powered by 01 DURAMAX/ALLISON, little of this, a little of that,
DIAMONDEYE 4" exhaust, CORSA muffler, AFE stage 1 dry filter, custom tuning by me, KENNEDY single pump and pump rub kit.
Try this tune file. If it feels like it's still giving you too much air, then take a bit more out of the cracker. Also be aware that this is a spark ignition engine... the amount of spark advance in off-throttle situations will also affect how much deceleration you get.
1998 GMC Sierra K1500 5.7/4L80E, longtubes, 411 w/COS 5, marine cam/intake, Whipple. 91 octane at 6000'.
1997 GMC Sierra K3500 7.4/4L80E, 411 w/COS 3, Whipple, small cam.
2004 Corvette Z06 with longtubes.