[Robert McLinden]

There's a picture of the upper channel. Marks channel is the six inch bolt spacing. I bought one set of those off ebay and I think it was from a fairlane. The spacing on later blocks is 7 inch and this is the size that Fran Kress made for me. I also found one locally that had been modified from six to seven inch spacing by welding a plate on it and relocating the holes.

The large rubber block comes in two varieties. One is just notched while the other I have has full enclosed mounting holes. One assembly I received had studs pressed in the fixed mount to accomadate the rubber block. Seems Ford just could not decide.