There are several on eBay, don't know all applications, though.

I just stumbled on a great catalogue(online) with applications, installation, bleeding instructions, almost 200 pages, go through it and just print out the applicable sections.

'Precisionrebuilders.com'
800-325-2690, Kim(gentleman) knows what his talking about.

I don't know how original you want to be, but with the installation of a power steering(hydraulic) pump, you could install a hydroboost system, much less room required, will replace the hydrovac unit.

Ed


Last edited by EdPruss; 04/22/2016 3:20 AM.
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.