Carb / Brake Master Clearance issues... Ideas?

[65swb45]

Went with geo metro as well, but i have 4 wheel discs. Works awesome.

...and an F carb.

 

[Rigger]

Bronco brake booster link in an FJ40

 

[Vae Victus]

Bronco brake booster link in an FJ40

Thanks Rigger. I have read this thread. Good ideas in here. My issue is the rib in the firewall and I'm not going to modify that rib, so I am currently sourcing an F carb.

The 2F carb has the vacuum advance that sticks out and interferes with the master cylinder.

Or if I could find a MC that is shorter than 5 5/8"....

 

[NHFJ]

You can see the MC hits the secondary diaphragm.
View attachment 1745784

View attachment 1745785

View attachment 1745786

Using (not the right insulator/spacer) you can see how far off I am from being able to mount the carb.
View attachment 1745787

The length of the MC must be 6" or shorter if this is going to work.
View attachment 1745788

saw something awhile back ,chevy s10 booster ,maybe not

 

[David70FJ40]

Same problem here so I dumped the mini truck booster and returned to manual 4 wheel disc brakes, for now. I am considering hydro boost as an option for better braking. Any opinions?

 

[Vae Victus]

Same problem here so I dumped the mini truck booster and returned to manual 4 wheel disc brakes, for now. I am considering hydro boost as an option for better braking. Any opinions?

I purchased and am awaiting delivery of a rebuilt F carb from Mark at Mark's Offroad. Not cheap, but the only thing standing between me and driving this vehicle. Once it is in place, it will be the key to this problem, and will allow me to have a booster, dual circuit brake master cylinder, and factory carb (with proper carb spacer) and air cleaner.

I don't have to rig anything, cut anything down, etc, plus I have the safety of a boosted 4 wheel disk brake system with redundancy in the unlikely event that one of the circuits fails.

I'll report back one I get it and install it.

 

[kevos37]

I purchased and am awaiting delivery of a rebuilt F carb from Mark at Mark's Offroad. Not cheap, but the only thing standing between me and driving this vehicle. Once it is in place, it will be the key to this problem, and will allow me to have a booster, dual circuit brake master cylinder, and factory carb (with proper carb spacer) and air cleaner.

I don't have to rig anything, cut anything down, etc, plus I have the safety of a boosted 4 wheel disk brake system with redundancy in the unlikely event that one of the circuits fails.

I'll report back one I get it and install it.

Best $$$ I spent buying one of Mark's carbs. Installed and primed it, fired right up and purred like a kitten!

Kevo

 

[Vae Victus]

Best $$$ I spent buying one of Mark's carbs. Installed and primed it, fired right up and purred like a kitten!

Kevo

That's music to my ears!

 

[Vae Victus]

I am happy to report that I have received a beautifully rebuilt 1973 F carb from Mark @65swb45. Thanks Mark!

Now I just need to find the unobtanium studs so I can mount it. Didn't realize that until I went and purchased the bolt long enough to fit and went.... ohhhh, those will not even go into the holes due to clearance issues on 3 sides.

So, who knows where I can source the studs? They are about 55-60 mm long x 8mm x 1.25 thread, with at least 12 mm on the bottom part of the stud that goes into the intake manifold.

 

[Vae Victus]

Here is the F carb fitted up to the motor. New studs from Toyota. Lots of clearance. Master looks like it is hitting but it's not tightened up all the way. It does move another 1/2" to the right and up when tight.