'75 P30 Hydroboost

[75P30]

It leaks where the pushrod enters it.  I haven't been able to locate a new or rebuilt one. Napa showed one, but it must've just recently gone the way of the Dodo.
Piratejack.net has a couple of rebuild kits that I'd have to match up the parts with their site's picture. That's a possibility, but I can't take the truck out of service (business vehicle) just to look at parts and maybe wait for them to show up.
I am adding Lucas sealer as it leaks.  Even if it works, not a good fix.
I'd remove and eliminate it if I knew what master cylinder to replace it with and how to plug up the hoses. 
Anyone ever mess with this stuff?   

[78BIG-TEN]

You should be able to get a reman unit,try another parts source,national chain

[75P30]

You should be able to get a reman unit,try another parts source,national chain

I've tried Rockauto, AutoZone, Advance, Pep Boys and Mill Supply. 

[VileZambonie]

It looks like summitracing carries it from cardone

http://www.summitracing.com/parts/aaz-52-7249/overview/year/1975/make/chevrolet/model/p30

[bd]

It looks like summitracing carries it from cardone

http://www.summitracing.com/parts/aaz-52-7249/overview/year/1975/make/chevrolet/model/p30

Good find, Vile!

Unfortunately, Summit is displaying the wrong image for this part.   

The correct image for 52-7249 can be found on the Cardone website.

[75P30]

It looks like summitracing carries it from cardone

http://www.summitracing.com/parts/aaz-52-7249/overview/year/1975/make/chevrolet/model/p30

Good find, Vile!

Unfortunately, Summit is displaying the wrong image for this part.   

The correct image for 52-7249 can be found on the Cardone website.

Yeah, I was going to say, that's the wrong image.  I ordered one from Summit.  I googled "Cardone 52-7249" and found several sources.  Some of them show it as unavailable or out of stock.   I'm having a hard time believing that it's really available since it's so hard to find.  I will find out! 
Thank you for the help.  I will update.

[75P30]

Summit's order confirmation email is showing it as backordered.

[roundhouse]

Is another hydro boost interchangeable ?

They used em in 82 pickups with the diesel and we just sold a 96 P chassis that had a hydro boost

And in Astro vans

Looked the same to me

[VileZambonie]

Personally I would trash the hydroboost system altogether but here try this:

http://www.ebay.com/itm/Cardone-Industries-52-7249-/111306079385?_trksid=p2054897.l4275

[78BIG-TEN]

Oreilly

[Irish_Alley]

http://www.autozone.com/brakes-and-traction-control/brake-power-booster/cardone-reman-brake-power-booster/38979_0_0/

[75P30]

It's been a while but just to update:
Summit kept changing the date for shipment.  I gave up and cancelled. I'm pretty sure it's not available, anywhere.   
I have added Lucas PS Sealer and it has all but stopped the leak. But that can only be temporary.
I would eliminate the thing, I don't mind manual brakes.  But, I have no idea what lines to disconnect.  Plus, I imagine the pedal ratio would be all wrong.
I wouldn't mind manual steering, either. (To get rid of everything hydroboost related.) I'd have to change out the steering box, but that's a whole other ball game...
I did find this:
http://www.piratejack.net/index.php?option=com_virtuemart&page=shop.browse&category_id=26&Itemid=6&vmcchk=1&Itemid=6
Maybe I could pull it apart and match up parts. 

[78BIG-TEN]

Oreillys Houston warehouse shows it #52-7249

[75P30]

Thanks 78bigten, it says unavailable, like everywhere I have checked.

[78BIG-TEN]

I'm linked in to first call(oreillys) here in SA and it shows me the store,the hub and the Houston warehouse stock and some others.Sorry I checked again and its not Houston,shows LDC,Seagoville Tx.If you like I can call and check for sure thru my end