I installed a new mc a few weeks ago. It didn't seem particularly difficult or different from any other part installation.
The bar is just a different shaped nut. Put the bolt through the mc, and stick it through the frame while holding the bar on the other side. Turn a few threads with your fingers and it will stay in place on its own.
More importantly, bench bleed the new mc before installation! It will make life a lot easier.
1950 Chevrolet 3100 (Ol' Roy)
1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)