If your car is hard to start or you suspect a vacuum leak, try replacing your choke pull off; it may just fix your problem!
1967-74 GM Quadrajet Carburetor Secondary Choke Pull Off Vacuum Break Mercruiser
Choke Pull Off Vacuum Break Carter AVS 4B 1968 - 1971 MOPAR 2933196 202-404
Quadrajet Carburetor Choke Pull Off vacuum brake 70-71 Chevrolet 617
1969-1974 Buick Rochester Quadrajet Carburetor Choke Pull Off Vacuum Break NOS
Carburetor Choke Pull Off Vacuum Brake For Quadrajet GM 67-74 For Ford 1970-71
1970-1974 Buick Quadrajet Secondary Choke Pull Off / Vacuum Brake - GS 350 455