Little Red Express Cam Specs

I read the W2's were originally made for the LRE truck but that seems a little out there. The 340 auto cam vs. the 360 4bbl cam is almost, if not, the same specs. The 76 360 Duster was the fastest car that year, I remember the cover of road and track or one of those rags with about 6 cars in a V formation on dry lake bed, Duster out in front.