The axles in the Mad Mudder were designed to stick out past the fenders so unless one builds some big flares for the wheelwells, swapping in the axles from the plow truck is probably your best option. If you use the engine from the Blazer, a different set of exhaust manifolds and an exhaust system will be in order, along with the aforementioned hardtop. Seeing how I am going to be raiding a plow truck for some parts, I might have to see if the above is possible and I just might have another WIP on my hands!!!!!!!!!!!!!!!!!!!!