I've read some other posts but I'm still a little confused about my vacuum advance connection.

There are two places for vacuum on my Monojet. One on the carb base points towards the oil filter of my 261. A second is higher on the carb body and points towards the valve cover.

Should I connect the vacuum advance tubing to the lower one which points forward? What do you do with the second one? Was that hooked to an automatic choke which someone has removed?

Thanks!!


1948 3/4-Ton 5-Window Flatbed Chevrolet

34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.