problem upgrading from drum to disc

[70jimmy]

I recently got a master cylinder and booster for a 1972 1 ton 4 wheel drive which they say is the same for 3/4 by the part number. My new axles are 4 wheel disc. Anyway I put everything on and noticed that the rod going into the back of the booster was tight agaisnt the firewall. I put pressure on it to get it to mount. When I pushed on the brake pedal it wouldn't move.

I measured the bracket and it was like 3 and 1/2 inches from firewall to back of booster. So I went to a friends first gen stash and checked his trucks. I found all but one of his had brackets that were more like 5 and 1/2 inches from firewall to back of booster. I put the different bracket on and voila'.

I also found the truck I took the bracket off had a support rod that went from the upper driver's side bolt on the back of the booster at an angle toward the driver's side firewall and mounted on a stud there. So I stole (I mean aquired that also).

Just more screwed up stuff I ran across in my restomod saga!!

 

[Burt4x4]

Yup,
My 72 received an upgrade from 1/2ton to 1ton master/booster.
the push rod was way shorter on the 1ton stuff. Now RyanB swaped just his booster and didn't need a shorter pushrod?? Duno why?
Oh and I too have the extra support rod

 

[supersize75k5]

thats odd..

I upgraded and there was no factory mount or location for a support rod...

what am I doing wrong????

......

 

[Greg72]

thats odd..

I upgraded and there was no factory mount or location for a support rod...

what am I doing wrong????

......

Well for starters.....your passenger door opens over your tranny.

 

[supersize75k5]

I always thought that didn't look right

back to the drawing board I guess