Engine: Carb spacer

[Henry]

I hope to be using an Edelbrock 1406 carb on my Stude V8 manifold, both with the spread bore pattern. I measure 4 and 1/4" between right & left studs...and 5 and 3/4" from front to back studs (on center). I can't seem to find specific information on websites that sell spacers, with measurements between the holes. I need to use a spacer for throttle and choke linkage clearance.
Has anyone encountered the same issue? Would greatly appreciate a part number. Thanks!

[enjenjo]

When you say spread bore are you talking about the throttle bore on the secondary throttle, or the bolt spacing on the mounting bolts? Also how thick do you need the spacer to be for choke clearance? On mine I used a 1/4" spacer for a 1407 Edelbrock.

[enjenjo]

I hit the wrong button. I only used a 1/4" spacer because of hood clearance problems. I can't give you a part number because I bought it used.

[StudeRich]

Edelbrock shows the 1406 as a Performer 600 cfm Electric Choke 4 Brl. $435.00 to $527.00 ea.
WHY would you use a WAY Oversize Carb. for a 289 ?

A 1403 is what you want, a Performer, Square Bore, Electric Choke 500 cfm 4 Brl. Carb. $434.00 to $534.00 ea.

Most people just break off, or cut that Ford Auto. Trans. piece on the bottom of the Throttle Lever off, to clear the Left Side easily.

[p-avern]

Yes, I got rid of my 1406 and replaced it with a 500cfm. The 600 seemed to have a narrow window of tunability, which I never managed to get right -- but I'm no expert. I used the 3-layer 'cardboard' gasket that I think came with the carb -- probably about 3/16" thick.
Yes, trim off the bottom of the throttle lever for clearance.

[Mike Van Veghten]

Yes, I got rid of my 1406 and replaced it with a 500cfm. The 600 seemed to have a narrow window of tunability, which I never managed to get right -- but I'm no expert. I used the 3-layer 'cardboard' gasket that I think came with the carb -- probably about 3/16" thick.
Yes, trim off the bottom of the throttle lever for clearance.

Agree with Rich -
Very good decision on going with the 500cfm carburetor.
While you could make the 600 work, and many do...the 500 version is overall, a MUCH better choice for all but the most highest level of both car and engine modifications.

Mike

[Henry]

I'm only using this carb because I bought a new one several months ago for another application that didn't work out. Having spent a fortune on parts & machining, I'm trying not to incur the wrath of my CFO with another 3 to $400 purchase. I realize it's probably overkill but I'll live with it.

[DEEPNHOCK]

Relax.. Here's the info for you to consider.
"If" you have four equal-sized throttle bores in your cast iron Studebaker intake, you have a WCFB intake.
"If" you put your (1403 or 1406) Edelbrock/Weber AFB on there the secondary butterflies will hit the secondary throttle bore holes and not fully open.
"If" you remove that intake and grind/mill the secondary opening a bit the secondaries will open without hitting the bores.
"If you do the above, and are running a Studebaker transmission (not a GM with a trans adapter plate) the GM trans kickdown linkage tab will hit the Studebaker intake heat crossover casting.
"If you trim the GM kickdown tab off (Zizz saw, cutoff wheel, hacksaw. Preferable to bending the tab) the carb will sit flat on the manifold with only a gasket. (No hood clearance issues, (see attached pic for where to trim)
"If" you do this you will need to run an aftermarket air cleaner. Those air cleaners can be had with a drop base to lower the air filter around the carb.
"If" that is too much for you, you can run a Mr. Gasket heat insulator gasket/heat insulator stack (Mr. Gasket Part# 97) (See attached Pic). Use enough gaskets and aluminum spacers to lift the carb up enough so the secondary butterflies open without hitting the manifold secondary throttle bores. This is easy, and it will work, but the 'step' left under the secondary throttle bores will mess up the airflow and cause some performance loss.
"If" That isn't your cup of tea, you can run a WCFB to AFB carb adapter plate. These will add 3/4" to your carb height (potential hood clearance) issues.

[Hawk GT SS]

My stock Stude 4bbl manifold studs measure 5 and 5/8 inch by 4 and 1/4. The Edelbrock carbs mounts measure 5 and 5/8 by 5 and 1/8th. Recheck your measurements. If they match these Summit Racing has some adapters that should work. Summit part # G1403 ($21) or Trans Dapt # TRD 2090 ($37). I think I used the Trans Dapt unit when I had the stock manifold on the V8 but I'm not sure as I got it many years ago. Old picture of it on a stock manifold painted grey. It worked well and I figure the cheaper Summit unit should be good too.

If you need to adapt to a spread bore manifold, Spectre 5785 ($32) might work. I think the studs/carb mounts are the same as above though. Lots of others to choose from if these don't work for you. Worth a look.

[bensherb]

I have a Holley Demon carb and have had a Holley 4160 and AFB on the stock manifold under the hood of my '62 GT. They have all been mounted with a 7/8" thick Phenolic spacer under them and the same 3" thick air cleaner assembly on top with a 3/4" tall wing nut. I've never had any clearance issues with any part of the carbs or their linkage arms or with the hood. If you start cutting parts off your carb arms you will not be able to use most modern auto transmissions should you want to down the road or the carb for another application should you decide not to use it on this one.

[bensherb]

I have a Holley Demon carb and have had a Holley 4160 and AFB on the stock manifold under the hood of my '62 GT. They have all been mounted with a 7/8" thick Phenolic spacer under them and the same 3" thick air cleaner assembly on top with a 3/4" tall wing nut. I've never had any clearance issues with any part of the carbs or their linkage arms or with the hood. If you start cutting parts off your carb arms you will not be able to use most modern auto transmissions should you want to down the road or the carb for another application should you decide not to use it on this one.

[Henry]

Your engine compartment is magnificent!

I bought Edelbrock's half inch spacer and everything clears.

Thanks, all!

[bensherb]

Thank you.