are my front/rear brake lines crossed?

[drdata]

Originally Posted by jaros44sr

. . .


You've come to the right place for information from guys that know what they're talking about! These guys have helped me out alot. Hang around it only gets better with time

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Dude, I wish I had your engine compartment. Very clean.

Thanks for the pics, and tips. I agree this site is awesome. I just ditched a 78 for a new to me 72 and finding its somewhat a whole new game.

The PO indicated he had put a new booster and MC on, and they do look new, but the tip off should have been the xtra vacuum can/reservoir. He claimed it was needed because the aggressive cam had low idle vacuum. I find the extra boost to be worse, as you go from really good brakes to somewhat wooden when you exhaust the supply. I'd rather have wood all the time so I know what to expect. (no pun intended).

I added a road demon carb and fixed his goofy dual pcv setup and now get about 17 inches at idle, which I believe should be enough for the booster. Still, when compared to my 1978 this 72 stops for crap. Then again I note the booster is smaller than the 78, and now seem he put the wrong MC on.

Regards

PS> I would consider a booster/mc upgrade (1 tom) but so far all the options are very confusing. Not clear what will just bolt up to the existing firewall and pedal linkage.

[lks dcvn]

Here is the replacement stuff my PO put on - duh!

It is new - but it isn't correct...

[1949gmc]

Originally Posted by lks dcvn

Here is the replacement stuff my PO put on - duh!

It is new - but it isn't correct...

It looks nice and shiny, though! Who cares if it stops?!

[1949gmc]

Fixing the PO's nonsense can be a real PITA. Can cost a lot of money, too. There are a lot pf people out there that are . Sometimes it's better to tear it all the way down and build it back up the right way.

Post some pics up if you get a chance. We like to look at pictures.

[jaros44sr]

Originally Posted by drdata

Dude, I wish I had your engine compartment. Very clean.

Thanks for the pics, and tips. I agree this site is awesome. I just ditched a 78 for a new to me 72 and finding its somewhat a whole new game.

PS> I would consider a booster/mc upgrade (1 tom) but so far all the options are very confusing. Not clear what will just bolt up to the existing firewall and pedal linkage.

Trust me when I tell you, it didn't start out looking like this,but it is what I enjoy doing to relax

Check out AJ's one ton thread, may be in the faq section. Good reading, and not hard to do

I had that same M/C in my hand 2 or 3 times, kept telling them it was wrong. Finally they believed me, dam counter kids

[drdata]

Pics of my none-too-kosher setup. Note the black canister, now disconnected, which was the extra vacuum storage tank.






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[old man jimmy]

I know this is going to start a bunch of controversy, but they did come with the 50 50 master cyl. I just went out to the garage to take a picture of mine. And I know for 100% sure mine has never been changed. So don't blame to PO's for everything. After all aren't we all PO's?

[drdata]

Originally Posted by old man jimmy

I know this is going to start a bunch of controversy, but they did come with the 50 50 master cyl. I just went out to the garage to take a picture of mine. And I know for 100% sure mine has never been changed. So don't blame to PO's for everything. After all aren't we all PO's?

Interesting. that explains why most searches come back pointing at what I already have. For the money I think i will try a 70/30 swap (should do the valve also). At least then I will know what it's not if the issue remains.

I try to console myself knowing the dude that bought my 78, which I owned for the last 21 years, will have his own PO issues. Still, not all POs are created equal. When I investigated why the front seat would not latch, I found the floor mounter catch to be rotated 180 degrees (the catch hole was on the wrong side). And the latch bolts were pretty much stripped anyway. I tell myself he must have known, and did this on purpose so folks in the rear could tilt the seat up easily...

But that make no sense given the latch release works and is accessible to those in the rear; what a safety hazard. This on a truck where "everything works". Right...

I did this in part to have something to do. Just did not plan on having that much. Have to keep repeating its the journey, not the destination...

Cheers

[old man jimmy]

if you're going to go that far with the brakes. I'd recomend converting to 3/4 ton, their's a lot of post on here on how to. Especially if you plan to run big tires. When mine was new it would lock em up pretty easy. Then I went to Armstong tru trak, which was about the only big tire out their at the time. But they weigh about 75 lbs. each. And all that rotating mass really put a hurt on my breakes. They still lock up, but you almost need both feet to do it.

[Burt4x4]

Here is what the 1Ton dual diapram Booster/Master looks like. The masters resavors are the same size but the lines are swaped...

When I bought the parts I used 72K304x4 Pickup to bolt right into my 72K5 and it doubled my braking power.