7037576 carter quadrajet on stock 70 skylark 350?

[freddyfingaz]

I found similar quadrajet from 69 Pontiac grand pix at junkyard for 35 bucks.   I'm not sure if this pix has 350 or 400 but id number is 7037576. I'm planning to rebuild it for my stock 70 Buick skylark 350. Should I go for it?

[Cliff Ruggles]

Not really a good choice for what you are doing.  The linkage is different, longer fuel filter housing, vacuum fittings, calibration, etc.  I would get a Buick core instead.  They are pretty common, and easier to find than the 67 Pontiac carb.....Cliff

[freddyfingaz]

Input gas line, vacuum, choke pull, look same to me. Only thing look different is slash vent valve that is connectes to  accelertor pump. I haven't check throttle linkages.   Calipers is different that's true. I thought I could change caliper to match for my Buick 350. I guess this qjet gonna be my dummy rebuilding to practice rebuild qjet.  Thanks Cliff! By way, I love your book!.

[Cliff Ruggles]

The chokes look similiar, but are not the same.

Linkage is completely different.

Fuel inlet on a 1970 Buick is a long housing/filter.

The calibration on the Buick carb is considerably different than the 67 carb.

The Buick 350 carburetors are common, and cheap, I'd spend my time and efforts on one of them instead of "cobbling" up things to use a Pontiac carb on it......Cliff

[freddyfingaz]

Yea, I just saw that. I didn't pay attention carefully. Thank you for your input.  I found original quadrajet at eBay. I think I will buy it.

[Cliff Ruggles]

If it doesn't pan out, I have several here in spare parts.  $75 each, plus the cost of the parts to build them.....Cliff

[freddyfingaz]

Sweet I will! By way, I'm real impressed with your book because I just met new friend who claim he's know quadrajet by heart for 45 years that he is teaching me everything he knows. He's great teacher. I asked him if he ever read your book. He said no. So I loaned him my book  since  last Saturday. He said WOW!  Good book and he actually learn something new and said ur book made lot of sense that he never thought of it. Hes just straight factory rebuild quadrajets. Thanks to you! Now, we are excited to experiments quadrajet for our modified engines.

[Cliff Ruggles]

It's interesting but we run into folks all the time that have been building Q-jets for many years.

It's pretty rare if any of them even know what idle tubes are, and 95 percent of them don't install bushings into the throttle body!......Cliff

[freddyfingaz]

Yup, I'm seeing that. At least he know it now and excited with new knowledge.

  I just got my oringial quadrajet... Everything are looking good but all throttles are very loose. I just wanted to make sure I'm heading on right path with this qjet.

  Only thing I should do are install throttle bushing on only  primary throttle, setting all throttle at 90 degree, repair leaky  bottom plugs, hexicoil 7/8 fuel filter housing, polishing power piston and accelerator pump, drill secondary Wells to .035, tap old checkball into accelerator seat and test leak, replace plastic  secondary cam, correct setting linkages,.test vacuum everything and choke pull offs, get accelerator pump with blue seal and grater spring?, then rebuild rest in stock way.

Would it bad idea if I use 1975 smaller floater with .125 solid fuel seat and fuel pressure regulator with high pressure mech pump and set it to 6.5 psi ?

[freddyfingaz]

I'm not sure about drill idle screw holes to .090 and clipping idle screws springs until they are fully sit and and add bypass system for more controlling idle. I think I will skip this and leave it stock. I'm little confusing.  I even got a advice from this dude saying I should modifies cfm to get better response.  Plus couple other advices.

[Cliff Ruggles]

A stock Buick 350 isn't going to need large idle mixture screw holes, or a small float.  I would get one of our SR kits, to get it up to par for modern fuel, and rebuild it back to stock specs.  Test the carb at that point, and go back and make changes if/as needed.

Very good idea to install bushings for the primary shaft during the build, or kit is easy to use, no drill press or special tools required........Cliff

[freddyfingaz]

What's the sign of secondary throttle that need throttle bushing repair?  My secondary throttle is loose pretty badly.

[Cliff Ruggles]

The secondary shaft is supposed to have some clearance, they seal tight on the large throttle plates when closed.  If you get them too tight, the throttle plates will not center and seal up each time they close.  I do NOT recomend bushing them....Cliff

[freddyfingaz]

Oh! Good to know. Many Thanks!