Originally Posted by
CJD
There are Holley spread bores. They were replacements for the old Rochesters. But so far he hasn't confirmed we are dealing with a Holley.
What happens when you connect the choke wire? Here is what should happen when you have all hooked up correctly:
If you pull the cover after the engine has sat and cooled, the choke will be open.
When you cycle the throttle full forward and back, the choke should set fully closed.
Once you crank and start, the choke will crack about 1/4" from full closed.
Then the choke will slowly move to the open position over about 90 seconds, until full open.
If you do have an electric choke, if you turn the ignition on and have the throttle slightly above idle (engine not started), then the choke should slowly move to open over a 90 second period.
Chokes rarely have to be moved off the center position on the adjuster. One or 2 notches makes a big difference.