03 Ford powerstroke Cummins swap questions

[85pickup4x4]

i have a 6.0 thats pretty well built. as you can see from my sig. my next step is a airdog 2 system. i have the 5R110 TorqShift Automatic Transmission, which is a very reliable trans that is capable of 1100 ft/lbs of torque. the engine has 120,000 miles on it. i have seen the power and torque of the 5.9 cummins, and i like it. i am more than satisfied with my diesels preformance but the cummins potential is much greater than my built 6.0. so i want to do the swap...... so a few questions about it....... should i keep my trans????? whats the best trans to have with a cummins?????? i hear allison will not stand against a high hp cummins. i want to build the cummins to put out well over 1000 ft/lbs of torque and 600hp-700hp. should i go with a manual dodge trans?????? how much torque am i loosing from the auto trans????? should i go with the 5.9 cummins or new 6.7 cummins???????
i know theres alot of questions in there but any help is appreciated thanks.....

[kTm520]

the new ones a 6.7 cummins. DEF go with the 05-07 common rail 5.9 with a 24 valve manifold so it actually sounds good.

[85pickup4x4]

your right 6.7...... im thinking powerstrokes 6.4. but im gonna build this cummins so strong that it sounds good anyways. i dont know much about either one though

[rdunagan]

any tranny wont hold unless you put better stuff in. and you can make a 6.0 have alot of power. just takes money. for the money you will put in doing the swap you might as well put it in the 6L and be done with it. thats just my opinion. im not saying dont do it as the cummins is a good motor but your talkin about alot of work and time and money that could be used to make that 6L into the same hp truck

[85pickup4x4]

i have money, im a commercial diver and love it.... but i can only imagine the torque of a manual transmission with a stage 3 clutch with 1800 ft/lbs of torque an 800 hp!!!! thats what i want to build.

[rdunagan]

more power to ya man! i like the attitude on it too!! if i knew alot about how to do this id help ya every way i can but i dont know to much about that set up

[85pickup4x4]

haha and i like the way you got yours set up..... how is that airdog for ya????? how much hp/mpg gain did you get from that???????? what will yours run in a 1/4 mile?????????? i want a manual trans with 1500ft/lbs behind it!!! cummins..... is the one for the job

[Dirty_Stroke]

The 6.7 Cummins sound way more badass than the 5.9's. The 5.9 just sounds like someone screaming in your ear, the 6.7 actually has whistle. My brother in law just bought a 6.7 megacab and his best friend bought a 5.9HO megacab literally within 3 days of each other. Both trucks are sitting on 35's and have 5 inch exhaust and Smarty with the TNTr software. Same exact truck except motors. Both running the same hp tunes; the 5.9HO put down a best 9.8 at the track with consist 9.9's. The 6.7 ran 9.3's consist! Not saying that the power potential isn't there for a 5.9, but the 6.7 looks to make power alot easier. And just for reference about the transmissions, I would stay away from the Allison. I've seen waaaaay too many of them tore up. EVEN Suncoast stage 5 built ones.

[85pickup4x4]

thats what i hear about the allison..... its not as good as i thought it was.... i find it hard to believe them cummins with a 5.9L and a 6.7L are running under 10 sec 1/4 mile with only smarty and exhaust........

[Dirty_Stroke]

Those are 1/8th mile times. We don't have a 1/4 track close to here.