tri-power
Thread Starter
6th Gear
Joined: Aug 2007
Posts: 6
Likes: 0
From: Scranton PA
tri-power
Hello everyone, I have a tri-power set-up that I am trying to determine if it is a matched set. The intake # is 3937797 my research showed this to be a 1969 427 cubic inch, 435 HP, L-71 intake. The outer carbs are 3659 and they came back as 67-68 427. The center carb is a 4056-1, it showed as 1970 427, 400-435 HP. I can not find,or maybe I do not recognize any date codes on either the carbs or the intake. I am looking to get them rebuilt. They look complete to me with the air cleaner and linkages, but the air cleaner is in rough shape. I have had this set up for about ten years now. I may sell it as is or have them rebuilt first. If anyone has any info or ideas how I can determine if they are an original set or how much I should ask for them it would be greatly appreciated. I was going to install them on a project I was building but I sold it. If I keep it I definitely want them rebuilt professionally. I can not find anyone in my area to do it. Thanks for everyones help. Bob
Drifting
Joined: Feb 2005
Posts: 1,438
Likes: 2
From: Melrose Florida
Just under the list number on the carbs is a 3-digit or 4-digit date code. If 4-digit, not original because later dating system. I don't remember for sure how to decode the date codes, but this will let you move a little forward.
Steve
Steve
Drifting
Joined: Feb 2005
Posts: 1,438
Likes: 2
From: Melrose Florida
Bob, on the manifold you listed, this is for a 435 horsepower car, and the center carb is for the very rare automatic from '69 only (255 made). If the date codes work out (front and rear are typically the same, and center is usually close), then you have a '69 435-auto tripower setup.
There should be an idle solenoid and bracket, as well...these are VERY valuable, as they were only for 435 hp-auto and 400 hp w/ac.
Regards,
Steve
There should be an idle solenoid and bracket, as well...these are VERY valuable, as they were only for 435 hp-auto and 400 hp w/ac.
Regards,
Steve
Drifting
Joined: Feb 2005
Posts: 1,438
Likes: 2
From: Melrose Florida
look at the bottom of the page at this link for date decoding (confirms that your carbs are later than '72, so replacements, not original):
http://www.chevellestuff.com/generic/holley_carbs.htm
Steve
http://www.chevellestuff.com/generic/holley_carbs.htm
Steve
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
Thread Starter
6th Gear
Joined: Aug 2007
Posts: 6
Likes: 0
From: Scranton PA
No I dont have that on the carbs. There is an arm behind the throttle cable connection that sticks straight up that I am unaware of what it would be for. There is also a small thin arm that is spring loaded and operates a rubber stopper on top of the center carb. Thanks for all your help. Bob
Drifting
Joined: Feb 2005
Posts: 1,438
Likes: 2
From: Melrose Florida
Bob,
Glad to help. The manifold is worth $800-1500 depending on condition, the end carbs are probably worth $250-$500 each, probably would go as a pair since dated the same. The center carb is probably worth a bit more -- was only used on '68-69 400 hp and 435 hp cars with automatic, maybe $300-600.
Steve
PS: I asked about the bracket because it has been described as a "$5000 bracket" due to its rarity!
Glad to help. The manifold is worth $800-1500 depending on condition, the end carbs are probably worth $250-$500 each, probably would go as a pair since dated the same. The center carb is probably worth a bit more -- was only used on '68-69 400 hp and 435 hp cars with automatic, maybe $300-600.
Steve
PS: I asked about the bracket because it has been described as a "$5000 bracket" due to its rarity!
Thread Starter
6th Gear
Joined: Aug 2007
Posts: 6
Likes: 0
From: Scranton PA
Thanks alot. Do you think I should have it rebuilt if I sell or just sell as is. I guess what I am saying is, is it worth it to spend the money to rebuild the carbs. Wow I wish I had the bracket.
Drifting
Joined: Feb 2005
Posts: 1,438
Likes: 2
From: Melrose Florida
Bob, merely my opinion, but I'd recommend selling as-is.
That way someone who needs the setup can deal with the rebuild hassles/time/expense;, and it would be hard to charge significantly more than the difference in cost.
As a setup, you could probably sell fast and easy for $1500, if you have more patience you could get a bit more.
Steve
That way someone who needs the setup can deal with the rebuild hassles/time/expense;, and it would be hard to charge significantly more than the difference in cost.
As a setup, you could probably sell fast and easy for $1500, if you have more patience you could get a bit more.
Steve
