I am changing out the orginal Motorcraft carb to a Holley. After several trips to Schucks Auto to get the additional parts I did not know I needed, kickdown for Ford automatic transmission and a Holley carb to quadrajet intake manifold adapter, I thought I was ready for the mounting party. I now have a question. If I use the gaskets supplied by Spectre (adapter company) it does not cover a cavity on the intake manifold the is next to the left primary intake. I would think the fuel would deposit in this cavity which is about 1 1/2 inches deep. The orginal gasket matches the motorcraft quadrajet carb perfectly so fuel never enter the cavity. So the question. Do I obtain a new quadrajet gasket to use between the adapter and the manifold, is it not problem or is yet another adapter?

 

A few points and some questions. First, what year is your truck. Next, what engine do you have, 429? Do you have EGR? The fact that you have a spreadbore (not Quadrajet, that is a GM carb) makes it likely that you have an EGR manifold. That passage you are talking about may be the EGR passage and if it is you need to put the adapter on top of the EGR spacer or you will really have some problems. Hawkrod

 

1976 F250 460, PCV, no EGR. The intake manifold has 4 intake holes, the rear are larger. (Quadrajet intake?) The Holley carb does not match up with intake holes. I was sold a Spectre 5773 which adapts a Holley, AFB/Carter or Edelbrock carburetor to a Quadrajet intake manifold. The cavity I was speaking of runs along the left side of the left intake hole. It is 1 1/2 deep and about 3 inches long and has no inlet into manifold. Under further investigation I beleive that to show go together this way, A new Quadrajet gasket, the orginal Quadrajet spacer, new adapter gasket, adapter, carburetor gasket, and finally the Holley carburetor. And new carburetor studs, because they are now too short to reach through carburetor. That makes about an inch of spacers. And then I will have a problem of connecting the PCV because there is no inlet on spacers or carburetor. Seems kinda hokey.

 

Yeah, sounds ugly. Buy a Holley spreadbore and be done with it. Do us all a favor, quit calling is a Quadrajet, its a spreadbore LOL! A Quadrajet is a Chevy carb not a Ford. Quadrajet is a licensed name of Delco and only applies to GM carbs and except for some special cars they were not used on Fords. Around here we pefer to keep brand X parts off of our tin! LOL Hawkrod

 

Just to clearify, The 70/71 429SCJ engines in Torinos came with a Rochester Q-Jet.

The open passage is possibly the EGR passage. Do you still have the EGR spacer plate on it?

 

Actually the CJ had the Quadrajet and the SCJ had a Holley. And as I noted they were only used on a few special cars which includes 70/71 429CJ Torino's Cyclones Montego and Falcons as well a 1971 429CJ Mustang's Cougar's and any Ford car equipped with a police 429. http://429mustangcougarinfo.50megs.com/new_page_2.htm
Hawkrod

 

Yeah, slip of the ole fat fingers again!! CJ is what I meant.