I don't have the return spring connected to the carb at the moment because I'm replacing it but here's my '60 linkage. May be a bit slack looking without the return spring.
That metal tab on the drivers side rear corner of your carb is the bracket where the return spring should connect. It's actually upside down on your holley and connects at an angle to the 4100 lining up the return spring in a straight line with the linkage.
My throttle linkage to the gas pedal measures 8 7/8 and there is about 5/8 inches of thread showing behind the lock nut on the kickdown linkage. This worked for my original Ford 4100 carb.
Ironically - after the engine fire I debated rebuilding my 4100, going with an edelbrock or some other route. Steve suggested an EFI but that's just a dream for me. Went with a holley similar to yours but don't have it completed yet. Rather than add a huge spacer for the linkage to clear the intake manifold I cut the unused portion of the bottom of the linkage off. I'll probably have pics later as I get it all bolted on. Will be using the original air cleaner.
The gas pedal will travel further than the carb linkage so I believe that slot in the linkage just allows the gas pedal to be pressed further and not damage the carb linkage. When it does the spring stretches and allows the linkage to keep moving which probably allows more adjustment for the transmission kickdown.
(If any of that makes sense - )
Eric
edit...
Found a pic of the linkage connected with the 4100 (after the fire). You can see how that return spring bracket mounts with the 4100 too.
hummm - we might find that to make the holly work with the COM it needs a solid linkage rather than flexible as original (with the spring).
Comment