What do I have here?

[73 Z28]

I recently picked up a dualjet at a swapmeet and as I was disassembling it, I noticed some unusual features.
In the baseplate between the throttle plates was a small cam lobe on the throttle shaft. This actuated a pin under the power piston making it work mechanically as the throttle was applied. The carb also had bushed main bleeds and a pullover enrichment system. Finally the primary metering rods were stamped 55P. I've had a couple of dualjets apart before but none were setup like this. What have I got here? Oddball application? Factory racing dualjet?  etc.?

Thanks for any answers
Paul

[Cliff Ruggles]

I've seen a few Q-jets set-up in a similiar manner.  They are somewhat rare, pretty sure they were used on late 1970's Cadillac engines, but there could have been other applications that used that set-up.....Cliff

[73 Z28]

Thanks for the info Cliff.  Thats interesting that some q-jets were made with this system too.

Paul