Shelby Drop Concern

1

19stang66

Member

Apr 16, 2003

689

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Aug 13, 2005

#1

• Aug 13, 2005

• #1

Hey,
I have a concern with doing the shelby drop. If I happen to be a little off with my template transfer measurements will it have an affect on anything? I printed off a template and transferred it onto a piece of metal. I really just don't want to screw this up. If I do screw it up somehow can I just bolt the upper arm back into the original holes and just leave the new ones as is? Thanks.

 

rbohm

Founding Member

Apr 12, 2002

6,698

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204

tucson,az

Aug 14, 2005

#2

• Aug 14, 2005

• #2

depends on what you consider "a little off". if that means 1/4" then you might have a problem depending on where that 1/4" is. if you mean 1/32", then no you dont have a problem.

oh and yes, if you have things really screwed up you can reinstall the arms in the original holes.

 

12sec67

Active Member

Oct 6, 2003

1,301

1

36

San Diego, Ca

Aug 14, 2005

#3

• Aug 14, 2005

• #3

it will change the position of the tire in the wheel well and could cause tire rub with the 17 x 8's and also making harder to make the alignment correct if its a big error in measurements

 

Hack

15 Year Member

Mar 23, 2004

1,945

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69

Minneapolis

Aug 14, 2005

#4

• Aug 14, 2005

• #4

The suspension and even the frame of these early cars are not that accurately built. Even today with modern cars all the suspension parts are not that accurate. Therefore they are built with shims and adjustments so that they can be aligned.

I agree with rbohm regarding the accuracy required. You do want to get the holes as accurate as you can just to be safe, but it's surely something most people can do in their driveways.

I believe that if you are careful and take your time you will not have a problem getting the holes placed accurately enough. If you are really concerned, buy a metal template or have a local machine shop make you one. The template will help you locate the new holes.

 

1

19stang66

Member

Apr 16, 2003

689

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16

Aug 14, 2005

#5

• Aug 14, 2005

• #5

I finished drilling the holes today! Had to go buy a $20 1/2" drill bit because my brand new one that has never been used before didn't do crap. The upper arms fit perfectly into the holes. I'll post a pic tomorrow. Need sleepy for 2-a-days football prac.

 

brianj5600

Active Member

Sep 19, 2003

1,964

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Middle TN

Aug 15, 2005

#6

• Aug 15, 2005

• #6

What is the part number stamped on the choke area of your carb?

 

G

grego37

New Member

May 12, 2004

576

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0

Fresno CA

Aug 15, 2005

#7

• Aug 15, 2005

• #7

Im a little late here, but make sure you have the correct template.
65/66 use one template
and 67/68 use a different template.

For future 'Shelby Drop' people, you can order solid template made from plexiglass from Global West (maybe TCP too) it makes it allot easier. Also when someone emails or faxes a template to you on paper, sometimes it shrinks , they should have a scale printed on it to check accuracy.

 

1

19stang66

Member

Apr 16, 2003

689

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Aug 15, 2005

#8

• Aug 15, 2005

• #8

ahhh i'll have to go check, just got home from prac. Where is the choke on the carb. i haven't had very much engine experience since my first car was a fricken rust bucket. I probably know once I see it.

 

1

19stang66

Member

Apr 16, 2003

689

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Aug 15, 2005

#9

• Aug 15, 2005

• #9

It is:
80457-2
1650

Im pretty blind and them small numbers are hard to read so I might be wrong.

 

Edbert

Founding Member

Jul 13, 2002

3,548

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Austin TX

Aug 15, 2005

#10

• Aug 15, 2005

• #10

What happened to your linkage?

 

1

19stang66

Member

Apr 16, 2003

689

0

16

Aug 15, 2005

#11

• Aug 15, 2005

• #11

wha?? linkage?? I told you i'm not familiar with carbs

 

tos

Founding Member

Apr 27, 2001

896

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59

Cincinnati Ohio

Aug 15, 2005

#12

• Aug 15, 2005

• #12

19stang66 which way is the front of your car in relation to this picture, Its hard to tell

 

tos

Founding Member

Apr 27, 2001

896

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Cincinnati Ohio

Aug 15, 2005

#13

• Aug 15, 2005

• #13

Your shelby drop picture that is.

 

1

19stang66

Member

Apr 16, 2003

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Aug 15, 2005

#14

• Aug 15, 2005

• #14

That is the passenger side wheelwell. Hence the holes being 1/8" rearwards. That white blob is the leftovers from a bee nest. So whats wrong with my carb??

 

brianj5600

Active Member

Sep 19, 2003

1,964

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39

Middle TN

Aug 15, 2005

#15

• Aug 15, 2005

• #15

This is what summit says about your carb. It is a vacuum secondary and not a double pumper.

HLY-0-80457S
Brand: Holley
Product Line: Holley Model 4160 Non-Adjustable Float Carburetors
Number of Barrels: 4
Carburetor Flange: Square bore
Choke: Electric
Fuel: Gasoline
Secondary Type: Vacuum
New or Remanufactured: New
Fuel Inlet: Single
CFM: 600
Carburetor Finish: Silver
Ford Kickdown: Yes
Throttle Linkage Type: Universal
Notes: New non-adjustable needle and seat float.

Carburetor, Replacement, 600 cfm, Square Bore, 4-Barrel, Electric Choke, Single Inlet, Silver, Ford, Each

Check to make sure this part fits your application
Superior performance and drivability in a "Bolt on and Go" performance package.
Here at last from Holley are the new and improved 4160 model 4-barrel carburetors. These carburetors are equipped with Holley's all-new Tru-Set needle and seats, which have eliminated the need for external adjustments. This change allows for easier "Bolt on and Go" performance. The floats have been factory-set for optimum fuel levels at 3 to 6 psi of fuel pressure, and should never need adjustment. If running over 6 psi of fuel, a fuel regulator is required. These carburetors also include a new, refined appearance on their float bowls, main bodies, and vacuum secondary caps. Along with having upgraded choke caps for smoother engine warmup and better cold drivability, these carbs are also the perfect upgrade for any ride.

 

1

19stang66

Member

Apr 16, 2003

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Aug 15, 2005

#16

• Aug 15, 2005

• #16

Well I guess I need to change my sig then Thanks brianj5600!

 

Edbert

Founding Member

Jul 13, 2002

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Austin TX

Aug 15, 2005

#17

• Aug 15, 2005

• #17

The linkage did not have the S bend in it from the factory, I doubt it will break anything but it looks odd. They came with two 90 degree bends, but it looks like someone changed those to about 120 degree bends, probably to shorten the shaft. But the back of the rod is threaded for such circumstances.

I wouldn't worry about it too much, just looked odd to me.

 

dennis112

15 Year Member

May 15, 2005

1,561

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79

Amish Wonderland of Central PA.

Aug 16, 2005

#18

• Aug 16, 2005

• #18

Edbert said:

The linkage did not have the S bend in it from the factory, I doubt it will break anything but it looks odd. They came with two 90 degree bends, but it looks like someone changed those to about 120 degree bends, probably to shorten the shaft. But the back of the rod is threaded for such circumstances.

I wouldn't worry about it too much, just looked odd to me.

Click to expand...

Nothing wrong with the bend.

It is often done when a Holley carb is added. If it was not bent (thereby shortening the linkage rod), the secondaries will not fully open.

Just cover it with a nice air cleaner and no one will know.

 

1

19stang66

Member

Apr 16, 2003

689

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16

Aug 16, 2005

#19

• Aug 16, 2005

• #19

Oh i see what your talking about, ya I got a chrome air cover for her.