Hello all! I’m new here so let me introduce myself, I’m Chuck in south central PA and I own a 1964 convertible. Doing some research on a replacement
carburetor and noticed that several 4th generation T-Bird owners have gone with the
Holley 670 Street Avenger. Have a few questions on items that I couldn’t find (or just plain missed
🙂 ):
- Did you need to make any changes to the throttle linkage or kick-down?
- Were you able to use the stock air cleaner?
- How did you wire the electric choke?
- Are you satisfied with the
carburetor swap?
Thanks in advance for any and all feedback.
Chuck
Hi there. I just installed a
670 street avenger on my '64. Looking at your questions and here's my input:
- For the throttle linkage, you have several options where to connect it to the
carb linkage. Just make sure that when the gas pedal is pressed all the way to the floor, the throttle is WOT, otherwise you'll be giving up some potential power. What I did before connecting the throttle linkage was to open the
carb wide open and make a register mark on the side of the
carb. Then connect the throttle linkage where you think it should go and see if you get WOT. I'm away from home but will send a photo of where mine is connected when I get home early next week.
- I wouldn't use the stock air cleaner housing. It's cleverly designed to restrict the flow of air into the throat of the
carb. Get a circular filter housing and use a K&N or equivalent free flow filter. More air = more power.
- The choke "+" wire has to connect to a source of a full 12 volts when the ignition is on. In my case, that was the "+" terminal of the
coil, but that's because I installed a
Pertronix relay to supply a full 12 volts to the
coil when the car is running. With the old style resistor wiring, the
coil is getting less than 12 volts when the engine is running.
- I was replacing an older
670 street avenger carb that was getting kind of cranky. The new one works like a champ, smoother idling, better throttle response and more power.
Doug