Holley Metering Block Screwdriver

[Stuart F.]

Anyone know a good source to purchase the special screwdriver used on the screws holding the metering plate inside the float bowel of the Holley end 2- barrel carbs used in the BB tri-power? I forget the name of the tool - been away from work too long, and the much hated Holley carbs.

Stu Fox

[Patrick B.]

Re: Holley Metering Block Screwdriver

It's called a clutch head screw driver. I bought mine many years ago from an auto supply store that sold Indestro tools. It was not considered a special tool for Holley carbs so there must be other applications out there.

[Stuart F.]

Re: Holley Metering Block Screwdriver

Thanks for reminding me. Ah yes, the infamous clutch head. As I recall they come in many sizes and were often seen in places like door hinges, but generally in the automotive industry. I have a number of Holley " how to books"' but none mention the tool. Surely there are a few big block tri-power owners out there that have come up against this on one of their weekend projects that may have found one recently.

Stu Fox

[Dick W.]

Re: Holley Metering Block Screwdriver

Try Amazon

[Larry M.]

Re: Holley Metering Block Screwdriver

Stu:

Any Tru-Value Hardware Store should have them. They are their "Master Mechanic" line of screwdrivers. I believe two sizes are available, so bring something (Holly part) to determine which one you need.

Larry

[Stuart F.]

Re: Holley Metering Block Screwdriver

Thanks Dick and Larry. I'll see what I can locate. I'm hoping to wrap up my son's tri-power rebuild job as soon as this weekend.

Probably should have checked with him first as I believe these are used in aviation and he may have a set in his tools WE bought him when he took A&P at the then Institute Of Aviation @ U. Of I.. They are Snap On tools and he treasures them so he won't take them to his Corvette garage.

Thanks again.

Stu Fox

[Gene M.]

Re: Holley Metering Block Screwdriver

Stu,
A small straight blade screw driver also works just fine. Be sure it fits inside the clutch head and your good to go. Bench grinder does the trick if it don't........

[John H.]

Re: Holley Metering Block Screwdriver

C1's have LOTS of clutch-head screws. Corvette Central sells a set of (4) that cover every size ever used on a Corvette.


ClutchDrivers.JPG

[Stuart F.]

Re: Holley Metering Block Screwdriver

Thanks John. Good information.

Stu Fox

[Stuart F.]

Re: Holley Metering Block Screwdriver

Gene:

I took your advice and made a tool from a straight screwdriver. I got them all broke loose real easy. I checked with Corvette Central and they do list a set of 4 "clutch head" screwdrivers, but they (like True Value) have to order them. The earliest availability date was June 23. I can't wait that long. I have to have them done and running on the car this next week. My son has a potential buyer coming to look at the car (his 69 L-89) next week end.

Thanks to all for your valuable advice.

See Ya!

Stu Fox