Power brakes for a 6 cyl bullnose

Does any one know if they ever offered power brakes for the 3.8 or the 4.0 liter 6 cylinder bullnose Commandos? I can not find a reference to the brake booster unit except for the v-8. I have a chance to het the booster from a '69.

Thanks,

Dave

 

Can't really say for sure if it was offered without doing some digging, don't see why it wouldn't have been although there may be some clearance issues with the carb/air filter but I don't think so. If you have a chance to get a booster grab it, same as what the BN used except it may only be a single diaphragm booster instead of a dual but hey, any power is better than no power.

 

Sure. Same as the V-8 setup.

AFAIK there's no aftermarket source for the booster and associated parts.

Parts from a '69 could be way, way different.

Better would be to adapt a new booster from a Wrangler, or one of the many 'universal' boosters sold by Summit, Jegs, etc.

An inline 6 Commando is way cool, despite what everybody else may think!

 

72 73 V8 Commandos were offered with power brakes
not offered with 6 cylinder engine that I can see

 

A 69 would bolt right on, make sure you get the whole thing, there are spacer blocks that go between the bracket and the firewall. Only difference is what I noted above, whether it's a single or dual diaphragm booster.
If you wanted to go new try piratejack.net out of North Carolina. Know a couple of guys that have used his setups and have been very happy with them. Good prices. I don't have the part numbers off hand and I'll be away from the computer for a few days. If you called they could probably set you up with what you need. I think the whole setup came in under $200.

 

I guess if go ahead and put it on I'll find out if there was reason it wasn't offered. But then 30 years in research should be helpful in finding a solution.

Thanks to all.

Dave

 

Surprising. My '75 CJ-6 (bought in 1975) came with factory power brakes. That was a 258 and T-14. I'd have thought they'd offer it on the Commando if it was available on the CJ. Maybe by 1975...

 

Looking at a picture of a BN on Ebay the problem with the six is that because of the mounting brackets and how far the booster needs to stick out the carb and air filter are right in the way. If you could find a flatter style booster that mounted tight to the firewall "maybe" you could get away with it. Would have to run the brake lines off the M/C towards the driver side too. Personally, I'd just drop a 304 into her and be done with it, lots of room for PB's then :twisted:.

 

Mmm. Hydroboost. That's how it's done on 6-cyl Wagoneers with the Mopar MPI (a big manifold).

Still a bit skeptical that the stock booster would not fit - the CJ is the same width and has roughly the same booster position and engine position as the bullnoses. The stock booster does not extend out from the firewall on a bracket like the later Jeeps have.

 

Here's the problem with the Jeepster/Commando booster. This is a single diaphragm, the dual is a little longer bit the mounting brackets are the same.

Hyrdra boost might be an option too.

 

That's not at all what the factory booster setup from my '73 V8 or '75 I6 CJ looked like. Maybe that's peculiar to the V6 Jeepsters?

 

Thanks for all the replys. The booster should get here soon and i'll know more then. If the air cleaner is the big problem I'll find a way to solve that. I did look at pirate jacks and they have some units that tuck back in a bit.

The current air cleaner is about 2" in diameter but I have a stock 232-258 one on the way. I have seen some aftermarket air cleaners that are offset. I could offset it towards the passenger side.

 

It's exactly the same as the one on my 73 Bullnose except it's a dual and the one pictured is a single. Firewall blocks, brackets, linkage are all the same from 67 to 73, Jeepster or Commando.

 

The booster was blown on my '73 Commando 304/auto when I got it. I went down to NAPA and ordered a rebuilt booster/MC funit or a '73 Wagoneer it bolted right in. I think the Waggy booster was a larger diameter which made it a bit harder to reach the dip stick, but it worked fine. Something to look for on high mileage Commados are cracks in the brake pedal mount on the interior firewall. I could not get full pressure on the brake pedal because of the mount cracks. Had to pull it and weld it up and voila! bg