mewalsh100
I wanna be Dave
I may be stating the obvious, or something you’ve already considered, but what about buying to sets of chassis rails and grafting to get the length you need to accommodate the wheelbase your after? I know you stated you don’t have much in way of specialty tools, but a good ruler / micrometer takes care of the measure twice end of it, your dremel tool takes care of the cut once portion. Once you’ve got it mocked up to your specs, it should be easy enough to find someone to do some quick welds to solidly mate the whole deal up. (With regard to the cuts / grafting, you’d want to do staggered or stair stepped cuts to the sections you would intend to mate.) Plenty of youtube videos on this for the 1:1 world for examples.