holley 390 linkage - Chevy Nova Forum
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Old 14th-September-2019, 11:28 PM   #1
LMB00
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holley 390 linkage

have a stock 64 chevy ii wagon with a 250 6cyls. has a holley 390. having trouble getting the throttle linkage to work properly. whenever i got full throttle, the stock rod bends keeping it from getting the carb ot open all the way.
any suggestion on a mock up or replacement set up.

Thanks Lee
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Old 15th-September-2019, 06:58 AM   #2
neils63ss

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Hi Lee, Welcome to the site! Can you put up a picture of what you have now. It will make suggestions or diagnosis easier and more accurate. Neil
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Old 15th-September-2019, 08:29 AM   #3
novawagon67

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Welcome to SNS and enjoy!! And yes we need a picture for surel
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Old 15th-September-2019, 09:14 AM   #4
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Check out this thread, it has good info

https://www.stevesnovasite.com/forum...d.php?t=661681
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Old 15th-September-2019, 09:42 AM   #5
LMB00
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holley 390 linkage

thanks for the info everyone, i will get to look it over later today. here are a few shots of what i have done till now.

Lee
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Old 15th-September-2019, 02:08 PM   #6
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Quote:
Originally Posted by Brooksey View Post
Look at the link that "Brooksey" posted --- some Very Good "390 Holley Carb info with Pictures" ……….
Thanks Dan …

That Whole 'link has some Great "Photos of carb Hook-ups and even info about using those "Split-Cast-Iron-Exhaust Manifolds"
-- Thanks to 'hbanger' (Brian).

Lee --- my 'Throttle bracket was from "Skip White Performance.com" , made hooking up my carb linkage very easy .
FYI : they sell that same carb-bracket @ Summit for twice the price, or Holley has the same carb bracket listed for
about $ 80.00 ------ Holley Part # 20 - 112

Be advised that my car is a 3rd gen -- and, uses a throttle cable as stock carb linkage. That "Stock throttle cable" @

O'Reilly's -- # CA-8472 …. 21" long - $ 11.99 .


I even bought a "Lokar 36" SS cable - that I did-not use (because my stock cable worked so well. Even hbanger
uses a throttle cable.


I hope this can help you, jim
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SIX-In - a - ROW MAKES -'em - GO
250 - w/OFFY Intake, Holley 390 - 4bbl, W/C T 5 - 3.08 Rear
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Old 15th-September-2019, 02:20 PM   #7
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LMBOO ----Lee

also I saw that you are using a "Clifford Intake" --- where both me & hbanger have "OFFY intakes" --- really no difference,
for hooking up th' throttle linkage.

Lee --- can you post up some pictures of your "under hood photos of your 'Complete motor' ---- those other pictures are almost
tooo close-up. See what I mean ………….. jim

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SIX-In - a - ROW MAKES -'em - GO
250 - w/OFFY Intake, Holley 390 - 4bbl, W/C T 5 - 3.08 Rear
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Old 16th-September-2019, 04:14 PM   #8
LMB00
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Holley 390

Thanks all for the info. i'm out of town this week but will do some research next week.
when going to a cable setup, what pedal assembly is getting used.

Lee
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Old 16th-September-2019, 07:11 PM   #9
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LMBOO
one of your big issues is that you have the wrong firewall linkage. Our L6 hangs down and is off set away from the intake Then the linkage goes up to the carb.Name:  Dual450Clifford.jpg
Views: 85
Size:  94.7 KB your linkage should only need a small off set to the carb kinda like what is in this photo.
Name:  20190916_092753_Burst01.jpg
Views: 81
Size:  127.1 KB and the firewall linkage arm should look like this one.
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Old 16th-September-2019, 07:13 PM   #10
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This should give you a better look at the right linkage off the firewall.
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Old 17th-September-2019, 03:40 PM   #11
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Quote:
Originally Posted by LMB00 View Post
Thanks all for the info. i'm out of town this week but will do some research next week.
when going to a cable setup, what pedal assembly is getting used.

Lee

For using a 3rd gen throttle "Pedal" …….. I think that would work very good , then the stock 'cable' would attach
very easy. My cable even hooked right onto my carb assembly really nice ---- I did have too mount a (cable)
" throttle ball" ---- for the end-of-the-cable-too-attach to. (I had another 'Holley Carb' that I robbed that throttle ball from).

#1 --- picture of my inside gas pedal



#2 --- I used the same 'Cable' that was for my 'stock 1bbl carb' .



#3 --- the "red circle" is where I installed my 'throttle ball' --- for the cable connection onto my 390 carb .



#4 --- This picture IS the current set-up on my 69 , 250ci motor.

…………. you can see that I did change one 'return-spring' -- because the two new springs were too stiff. Also,
you can see where I installed 2 -- 5/16" bolts on the carb bracket at each side of each mounting blocks ---
just incase that block were to come loose and want to slide out of adjustment.


"click on the top bar --- to enlarge these pictures --- for the best view"




Lee …

even if you buy the "3rd gen style gas pedal & throttle cable" ---- I think it will be easy to install into an early style Nova.
I can also take any more pictures if you need more .

NPHNP --- --- jim
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SIX-In - a - ROW MAKES -'em - GO
250 - w/OFFY Intake, Holley 390 - 4bbl, W/C T 5 - 3.08 Rear

Last edited by Twinshadows; 17th-September-2019 at 03:43 PM.
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Old 17th-September-2019, 04:58 PM   #12
Twinshadows
 
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Lee ….

You may need one of these "plastic throttle accelerator cable -- retainer inserts " .
It attaches the cable to the accelerator pedal arm (inside the car) .

chevy2only -- part # 03021

I looked : I show this - more to show the part that goes there -
if you buy another gas pedal assembly (for example: to fit a 3rd gen style gas pedal ==== make sure to also buy this plastic clip …. or ….
make sure it is included in the "kit" .

looks like this :

https://gmclassics.com/part/throttle...tor-pedal-arm/

or :

Classic Industries.com ----- (same plastic accelerator clip :

https://www.classicindustries.com/shop/search/?q=403929




just trying too help …. been there !

jim
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SIX-In - a - ROW MAKES -'em - GO
250 - w/OFFY Intake, Holley 390 - 4bbl, W/C T 5 - 3.08 Rear

Last edited by Twinshadows; 17th-September-2019 at 05:42 PM.
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