is the truck next door going to be the donor frame or are you planning on doing up the existing frame with all your mods/wants/NEEDS?
here are a few links to interesting things you may want to spend time looking at before you decide what to do with yours. some are new frames, for ideas mostly, some are frame swaps, some are new home made frames. there are so many options but you should decide what you want in the end and go from there. some will weld in a front end from some other old car. thats fine but will look like a graft and also use old parts so factor in a rebuild as well. some will spend the bucks and get a whole new frame. thats cool too but not that many can afford it. some will lop off the front and weld in a clip then lop off the rear and weld in a big c notch. thats also cool but really a whole new frame-home made or purchased, would be better since the only "old" section is under the cab. the canadian hotrods frames look really nice and the USD goes further there. same as the welders series stuff if you need brackets or bars or other hotrod steel.
post up a want list and see what happens. lots of guys have been there already so you should get some good replies back.
some of the issues you may encounter are legroom due to short cab. finding a suitable seat that fits without being straight up and down, again, due to the short cab front to rear and the slope of the rear cab wall. foot room due to a trans hump install and this can affect the accel pedal mounting and angle. firewall or frame mounted brake master cylinder. firewall mounted requires some stiffening of the firewall.frame mounted means a small dual diaphragm booster or hydroboost system and also some innovative linkage depending on what you do for frame boxing-front suspension etc. it can get close for exh system under there. steering column interference with headers or exh manifolds. frame stiffness under the cab due to cross member removal in the area. this can cause frame flex under the cab mounts which can affect the fender to cab and door fitment. fuel tank style and filler location (please move this out of the cab). rad choice and engine cooling (fan style) choices. this can get tight depending on engine placement.
anyway, let usknow what you are looking at.and POST PICS. we all love pics.
http://www.scottshotrods.com/1955-59...truck-chassis/
https://www.canadianhotrodsinc.com/
https://totalcostinvolved.com/produc...9-chevy-truck/
https://www.heidts.com/part/super-ri...ar-suspension/
http://67-72chevytrucks.com/vboard/s...=398361&page=3
https://welderseries.com/?_vsrefdom=...QaAmKmEALw_wcB