I am in the process of taking the engine out of my 68. It's time for a rebuild.

I removed the old carb (4160 style, Holley)...this is a square bore type.
I discovered that my intake is a spread bore. Someone just stuck the 4160 on the spread bore intake.

I don't think this is right. The Holley site shows an adapter that goes from square bore to spread bore.

My question....

Is this going to be an okay setup if I use the proper adapter?

Just bought a replacement 4160 carb..and I would rather not have to buy another (spread bore)....but if it's not going to work...I will have to.

Need some experienced direction on this, please.

Vic

 

If you are talking about this, http://www.google.com/imgres?imgurl=...iw=869&bih=567
it should work fine. you can use the spacer plate.

Jason

 

Thanks Jason.

This is what I was refering to:

http://www.holley.com/17-6.asp

Vic

 

oh gotcha. it will work, you should not have anything bind up. should go on just fine.

 

That will work but it's not optimal,I'd rather get the right intake or a spreadbore carb depending how I plan on using it.
If all out performance is what you're after I'd get a better intake in a single plane to go with the even bore carb you have but if streetability and gas mileage is a greater concern I'd get a spreadbore carb to go with the existing intake.
If just getting it back together and drive-able on a tight budget is paramount then that adapter is your ticket.

 

Is it a factory style spread bore, or is it a dual pattern intake?

 

+1 Y2k, given the fact that you can order an Endura Shine RPM for a couple of bills, I'd give a new intake a shot. An intake like that 15 years ago would have cost $600 to $800 dollars.

 

Excellent points, Thanks.
To answer Jr.'s question here is a picture of my intake... It is a Holley made by Winters...
In most cases I would rather go with original. But I was not lucky enough to have the original carb or intake. So that brings me to the question of what do I want to achieve. The answer is that this is not a perfromnace machine. It is intended to be a very nice Summer driver.

So ideally I shoud match the carb with the intake...that makes perfect sense. Now the question is do I buy another carb to go with this intake, or do I buy a different intake to go with a straight bore. Which will be more economical?

Or based on what I want to achieve, just buy the adapter?

 

I would replace the intake, I am not a fan of adapter plates..less and matched is better. What is the cfm rating on your carb and what is the rest of your motor set-up?

 

If you want it more economical get a spread bore carb and use that intake.
That is a dual plane intake which is best for low end power and smooth running on the street.
A spreadbore carb will have smaller primary venturi so if you keep your foot out of the secondaries it will provide better fuel economy than that even bore carb ever will.
If that even bore carb is a 750 it's probably more carb than you want or need anyway,a 650 spread bore will be plenty and give decent mileage.
If it is the 600 vacuum secondary carb that I suspect it is your mileage may not change much but I'd still prefer a spread bore 650 for better performance when you do stab it to the floor.