A Blazer will be short by about 10". I've seen guys use the shortbed pickup frames, they're close, about 2" longer, or use the drivetrain with the original chassis. I would opt for the latter, as it only involves some suspension mods, no body mount fabrication or frame lengthening. Seeing as the '55-'59 is already a leaf spring truck, it makes thing much easier. The drive axle can be installed using the existing suspension. You may need to get some deeper arched springs and/or rear ift blocks to get the ride hight up for clearance. I don't know of any how to manuals, but if you can find it, 4 Wheel and Off road magazine did a '57 conversion some time back. It was called Project Early Iron.
