47-55.1 1949 GMC panel truck...what company makes ladder bars or caltracs ?

[weim55]

You might want to rethink using any of the stock springs set up in a high horsepower/Slicks combination in one of these trucks. The entire stock spring set up is dicey at best under that kind of stress. Spindly stuff. My son put a set of traction bars on it otherwise stock spring set up under his 55 Chevy. He broke every single component including the original spring perches on the transplant 57 Pontiac rear axle. The main spring completely twisted and almost ripped out of the front spring mounts. In the end he purchased Cal tracks with a set of dedicated Cal track Leaf springs and then beefed up every component for the mounting. No issue since then.

Steve weim55 Colorado