720 break booster in a 521

[kylezone]

ok, so the problem is, I need a break booster, but the 521 clutch/ break masters are super close together, so no room for a booster. With 720s Nissan was super cool and decided to put the booster on a pedistle that pushed it out past the clutch master, so thats what im using.

The pedistle is pretty big, and has a plate that extends out over the spedo-cable hole and gets in the way of where im eventually going to have to put my 720 stearing column bracket.



the booster side of the pedistle has 4 nuts that hold it on, so i removed those to flip it 180 degrees.





now the longer side of the plate is covering the clutch master hole, so I took a piece of heavy paper and makde a quick template.









I aligned the pedistle so it was positioned where i wanted it over the break master hole, and trying to keep things parallel so that the new master isnt tilted when installed.




and than made a mark where the clutch master will be.


I only wanted to cut a hole big enough for the flange on the firewall side of the clutch master to fit into, so that the clutch master is sitting on top of the pedistle plate, partly to hide my really bad cutting skills. (all i had to work with was an angle grinder lol.) and partly to help hold the pedistle against the firewall.





Its not quite finished yet, i still have to do a bit of trimming to get it to fit, and ill need to hammer-in a small section of the driver side wheel well to clear the booster. but you get the idea.

and a huge thank you to Wayno for all the help!

[DRIVEN]

Good writeup.

[jayden71]

Nice write up man!

There are lots of 720s in my area junkyards

I may cinsider doing this.

[Charlie69]

Looks like it belongs. What other clearance issues did you have?

[wayno]

Looks like it belongs. What other clearance issues did you have?

This is what I did in my 521KC diesel, the thing that worked out for me was that the diesel intake manifold doesn't stick out that far, so the Ford Courier booster doesn't hit anything.












You can see I had to change the mount hole location for the master brake cylinder, and I had to hit the inner fender a little to clearance the Ford Courier booster, but it worked out great with the diesel engine in the truck, the stock downdraft carb manifold might also clear, I guess it would depend on what booster was used, not sure about dual SUs though.