When I switched to a Holley from a Motorcraft, the original carb throttle adapter bracket didn't work well.
With that bracket, yes, the Holley would not open entirely.
All that was needed though was to relocate the throttle cable connection on the carb.
This is a 1"x 1/8" piece of aluminum bar stock from Home Depot.
I didn't need to reinvent the wheel. That carb opened 100%.
The simple linear travel of the cable is 1-3/4". You adjust that with the -3 rod end to get the length and the height of the pedal right where you want it to be.
It is VERY simple fix?
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