Proportion Valve in your catalog is not correct for Chevelle(?)
Have ordered many $$ from NPD and always impressed with the customer service and the products. I ordered PN 2B091-20BA which is advertised as the main proportioning valve for '69 disc/drum factory setup. It is not correct in 2 ways:
1) (Not the most important issue but...)You would have to drill holes through the frame to mount it vs. the bracket that comes with original and makes it very easy to mount.
2) Most importantly the fittings (of which there are 5) are not all the correct size. In fact I think only 2 are the correct size. You would have to redo your brakelines that lead to the valve.
3) You would also have to bend the lines to fit the location of your valve to get them close to fitting.
Spoke to one of your Ventura reps and once he heard what I was saying he was surprised it appears in your Chevelle catalog.
San Diego, CA
All Numbers Matching
L35 TH400 3.07
Factory Air, am/fm Stereo, PS, PB Disc/Drums
Factory SS Package
Dover White, Black Interior, Bench Seat
Restored to show condition-SOLD