Cliff's Quadrajet Parts and Rebuild Kits

  Im not sure if this is something that would be permissible here or not, but I've been doing some preliminary tests on an HEI distributor using different centerplates and weights trying to determine what degree of advance is possible for the particular parts I've got on hand.
 I had found a chart on another website that gave some of these figures, but most all of them were using just one set of weights.
 I have either 9 or 10 different distributors, but 4 are in various vehicles at the moment, so I'm just using what I have easy access to right now, as this started as an alternative method to climbing under the hood and swapping the parts and then running the engine and using gas to find the parameters for a given set of parts.
 The only drawback to my current method is that I still don't know at what RPM's any given combination of parts gives the best advance curve.
 Im able to determine what the maximum advance is, with the centerplate facing up or down, but the actual RPM's that it begins and ends at will still need to be done on the engine.
 The advance springs are also another variable in the advance rate, which would also have to be checked on the engine.

 I guess what im getting at here is,  would anyone be interested in this limited amount of information for a handful of different centerplate/weight combinations, and would it be permitted here on this site?

   Rick

I recently tracked down my father's first truck, a 1969 GMC 2500 first sold on March 27, 1969 in Knoxville TN.  It was then sold to my grandfather in the 1970s, and he kept it until he passed away in 1991. Later that year, my grandmother gave the truck to my grandfather's little brother, who gave it to his son. He used it until 2001, and then parked it on a family piece of property. There it sat until he died in 2022, and his son (technically my third cousin) sold it to a neighbor of his. I recently bought the truck from him, and it came with a lot of paperwork, including my dad's Protect-O-Plate. One change the recent owner made was replacing the carb. I have the "original" carb and will rebuild it if it truly is the original carb.

The number is correct, 7029207, but the date code has me confused. It's 1687. Normally, I'd say that was the 168th day of 1967, but the truck is a 1969 model. I  don't think they would have used a carb built in 1967 on a 1969 truck, but maybe they would. It seems to have the correct manual choke mechanism, and it seems correct. Also, the truck has only ~86K miles on it, and I know that's correct. I have no reason to believe that the carb was ever replaced, as my grandfather was a master auto mechanic at Ford, and I have no receipt for a change. I have receipts for dozens of other repairs. I'll try to include several photos in a later reply, and would appreciate any information anyone is willing to share. Thanks

  Hey Novadude,
 I just checked the site for new posts and saw this one.  I looked at what I've got on hand and I have 2 sets of the AX rods, but both are the brass with whatever coating is typically used on them.
 Out of curiosity I checked all my other rods with a magnet and I found a set of Ak's that are steel. Out of some 70 or so rods, that's all I've found.
  Who'da  thunk it?

I'm interested in this as well. Could you post the info you've tracked down already? My '66 carb and my '71 service replacement both take a spring with the PN 9029922 and I don't have a clue where it lies in the stiffness ratings. I suspect it's in the middle but it would be nice to know definitively especially if you wanted to replace with a nice new one of the same spec.

Maybe I've been lucky. I don't tap too deep so they fit snug, & yea I used 1/8 in. long ones for the LIAB. If you don't trust them I guess some locktite would work.