yes, that sounds correct, sometimes if the tq convertor doesn't unlock in a timely fashion it will cause the motor to bog as it comes to a stop. If you could monitor fuel trims, sometimes the pcm is dumping fuel when coming to a stop..I've had my tuner lean out the mixture near idle to correct this (I had the same issue because of the cam). The stall I use is mild enough that you can't tell the rpm difference. It won't lessen the load (gears will do that). What it does is give you more tq when you lock it up (go wot from a stop). You don't realize the slippage in the stock vertor until you install a higher stall vertor.
-fast freddie- one quick 05 hemi qc...with over 280k miles on odo... on the 5.7, stroker 6.4 now...Inertia Motorsports 392 stroker
5.7 e.t.'s: 1/8 - firstname.lastname@example.org, 1/4 - email@example.com juice - 12.96 NA... 6.4 e.t. 12.43@109 NA
2005 Dodge Ram 1500 QC SLT: 12.107 @ 113.960 MPH