Under Dog

Sorry about not getting back sooner. Had couple hot loads then finally some home time. I dont have the allison. The trans is the m drive. A 13 speed with clutch all electronic over air controlled. Yes it was a 550hp was just to much power. Took in to shop in Flagstaff has a wiz mack man there. He use to do double and triple frame conversions. He played with it for two weeks. Unreal how it runs. He told me if you live in an area you can get away removing all the emissions crap and retune the engine he says it will turn into a beast and hold together. Ive run alot of different trks over the years for people. These new macks are holding together and making money. What more can a person ask for?

Under Dog, what was your motor originally set at and how did you set it to 450? I was thinking about the 445 cause I don't think you can get the Allison with the 505. I know some guys that have the Allison and love them. I do a lot of stop and go in traffic for half the year and think the Allison would be great. The auto shift doesn't work good for the construction stuff I do. That's why they don't offer the M Drive in the Granite.

Best place to obtain info is the factory. Pull the engine control code off id plate call and they will take care of your needs.

Found this mack in south fl. Gona ck on it mire this trip home. Was told its a R68ST butterfly hood w/flat fenders/front.

Wow! 6 million americans. I left nyc monday on this run. Guess they all live in nyc.

Wife and I been looking for one like this. Just not quite this shape. Would like to talk to the owner. See if can work some thing out. Thanks.

The fuel shut off plunger on old cats is on back of the pump prime. Just lift the throttle peddle. If properly adjusted will cut off low pressure fuel feed. If not...well can always snuff it out.