When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
****, I don't remember the difference anymore. But I also have the front cab mounts moved from the stock 78 location. So that prob has something to do with it.
Difference is the newer ones are narrower cause the newer frames are wider. You put them on the old frame and dont work. Too narrow. The newer one's only have 4 rivits into the side of the frame and 70's have 4 on the side and 2 on top of the frame rail.