I have a 49 two ton with a dump that I haul heavy loads up and down steep passes with and I need a dual cylinder master brake cylinder. The easiest way, it seems to me, to mount it would be under the floor, but that would mean cutting a much bigger hole in the floor, which I could do, but has anybody mounted it on the firewall and used a later model linkage? I could probably figure it out by looking at the linkage on my 79 chevy but would that require using the 79 booster too? Would mounting it anywhere under the hood require a booster? I don't want to experiment, but if someone has already done this I would appreciate some reference to a good youtube vid or something like that. (thats my next stop). Thanks