Brian Conn Posted March 3 I have a Mack DM 800 ,tractor version, that I need to increase the wheelbase on. I have a 3-D printed oval tank that will be used with the build. I have scoured the internet including Big Mack Trucks.com with no luck finding any wheelbase options for the DM 800. I did find one spec sheet for the DM 800 showing multiple wheelbases, but the print was so small that any attempt to enlarge it only blurred it. Mack has a fair amount of wheelbase info. on some of its other models, but for some reason the DM 800 remains elusive. My question is to those of you who have stretched a frame to accommodate a body (dump,flatbed, wrecker, etc. etc) do you just dry fit the body and stretch it so the the tandems are where they are suppose to be or is there something else involved. Share this post Link to post Share on other sites
vincen47 Posted March 4 On 3/2/2026 at 10:05 PM, Brian Conn said: I have a Mack DM 800 ,tractor version, that I need to increase the wheelbase on. I have a 3-D printed oval tank that will be used with the build. I have scoured the internet including Big Mack Trucks.com with no luck finding any wheelbase options for the DM 800. I did find one spec sheet for the DM 800 showing multiple wheelbases, but the print was so small that any attempt to enlarge it only blurred it. Mack has a fair amount of wheelbase info. on some of its other models, but for some reason the DM 800 remains elusive. My question is to those of you who have stretched a frame to accommodate a body (dump,flatbed, wrecker, etc. etc) do you just dry fit the body and stretch it so the the tandems are where they are suppose to be or is there something else involved. Sorry to hear your search hasn’t yielded much info. I unfortunately can’t offer specific as to wheelbase offerings, but I have stretched frames to accommodate bodies. I definitely agree that you can just place the tandems where they “look right”, and go from there. Sort of, “reverse engineer” the project based on what your eye tells you is right. That’s ultimately what you’re aiming to please - your own opinion of what’s realistic based on what is sweet to your eye. Share this post Link to post Share on other sites
Brian Conn Posted March 5 appreciate your in put ......I just presumed that finding info. on the Mack would be like my previous findings (dimensions) on the 60's era International Harvester DCO 405 Emeryvilles and VCO A 190's as well as the Ford C series cab overs....discovered volumes of useful information. Looks like I will have to add 12 to 18 scale inches to accommodate the tank body...still undecided about adding a pusher axle. 1 Share this post Link to post Share on other sites
