Hey,
I'm doing the same project: 1955 - 59 cab & front end on an '89 chev truck chassis (same chassis as yours except mine isn't a 4x4). e-zchassisswaps.com has a new kit being developed right now for this chassis, so I might take the easy way out and just order it. None the less, it should be easy to fab up my own mounts, so we shal see when the time comes. Check out their website and let us know your thoughts,
Gregger
