The '69 Chevrolet Service Manual provides information on how to adjust the divorced choke rod on Z28 302's (and other Holley 4 barrel equipped V8 engines) on pages 6M-3 and 6M-7. As written, the procedure is unclear. On page 6M-3 it says:
"On all engines except L6 and 2 barrel V-8 engines, hold the choke valve closed and push the rod downward to contact stop -- the top of the rod should be even with the bottom of the hole in the choke lever. On L6 and 2 barrel engines, hold the choke valve closed and pull rod upward to end of travel. The bottom of the rod should be even with the the top of the hole in choke lever."
There is no specific reference to Holley 4 barrel equipped engines in the 6M-3 page write up. Therefore, should the choke rod be adjusted (bent) in the same manner as the above description for the L6 and 2 barrel engines, so that the bottom of the rod is even with the top of the hole in the lever? I ask this because the 302 choke rod operates similarly to the L6 and 2 barrel engines -- namely, the choke rod is pulled upwards to hit the end of its travel.
Then, on page 6M-7 it says:
"With Rochester 4MV and Holley Carburetors, install the choke rod and adjust as necessary. Be sure choke valve moves freely from full open to full closed position."
I assume the instruction on page 6M-7 refers to the procedure on page 6M-3 which, unfortunately, does not mention Holley 4 barrel equipped engines.
Is the L6 and 2 barrel V8 procedure the correct choke adjustment procedure others have used on faithfully restored 302's that results in clean starts when the throttle is pumped just once to set the choke, without having to pump the throttle multiple times, before turning the key to start the engine?
If anyone can shed more light on this maintenance/adjustment procedure for 302 z28's , I would be very grateful.
