i just dont see it... i have the same truck basically as you do, with longtubes and intake on 32's and i have to floor this beast to keep up with traffic off of a redlight... i see these things running an 18 or so at best. this transmission is a slushbox, its geared too low for "racing" and not to mention the 4.10 rear and all the power that is robbed transferring through the big 14b rear.

 

I have an 03 2500hd 6.0 5speed with 33 and a tune and other work.The last time I was at the track ran 17.01 with 31 super swampers and no tune.i fiqure im in the low 16 maybe high 15 now wanna go to the track in the next couple of weeks. but mine will run hard and fast i dont have any trouble with the gear box or the 14 b with 4.10's

 

wow, my 1500 with 6.0 LT, Full exhaust, 4.56 gears, Costum tune, and some other goods, I ran a best of 14.7. Stock I was 15.7 and a lot lighter than a 2500. Best I can see a stock 2500 run is a low 17 high 16

 

Spray a 100 shot on it will be a good start

 

,,,bolt ons + cam + stall will give you a good start

 

shifting gears on that big *** bus, I just don't see 14s without FI or nitrous.

 

What's the time calculated on 105 mph in the quarter mile? Because that's what I can get my 5 speed, 6.0 HD up to in a quarter mile stretch outside my neighborhood. Its exactly a 1/4 mile too between two road signs so I'm not just guessing.

 

Stock my truck ran a 16.1 ecsb 4x4 2500hd

 

https://www.performancetrucks.net/fo...Tech/gr_bs.gif

 

Go to the track and see if you trap 105.