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Rebuilding a carb for my Pontiac 350 - 17058253

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sixth_sense676:
Howdy folks,

First off, great site. Thanks very much Cliff, for making this forum and being such a great help to us all!

I have a Pontiac 350 being built, with #46 (72cc) heads. The intake valve has been enlarged to 2.11, screw in studs added, etc. I will be running a Comp XE262 cam, headers, and 2.5" true dual exhaust. The intake is from a '68 GTO, and I will be using the Shaker Assembly that came with my car.

The Carb I have is a 17058253, which comes down to a 800cfm '78 Olds carb, non California std. I would like to rebuild it myself, but have never rebuilt a carb before, and was wondering if you could help me answer a few questions.

Is the 17058253 a good carb, or should I look for another?

If it is a good carb, what rebuild kit should I get for it? I cant seem to find kits for this specific carb.

Any tuning/rebuilding/jetting suggestions?

It will be used mostly about town, and the occasional road trip. It will be my daily driver. Id like to get decent mileage (18-22mpg if possible) on the primaries, but also be able to put the fear of God into a ricer when the secondaries open up.

Thanks!
 -Derrick

Cliff Ruggles:
Excellent starting point for what you are doing.  Even though the later Old's unit is emission calibrated, they just need a few minor modifications and they are fine.

We stock complete HP kits, and the correct tuning parts to set it up exactly for the application.  When you get time, call the shop and we'll get what you need headed your way...thanks....Cliff

sixth_sense676:
Great! Thanks Cliff! Give you a call in a few days.

sixth_sense676:
Just received my HP kit today. Very fast shipping, high quality parts, and packaged very carefully! Thank you!

Hope you don't mind if I bug you with questions along the way, never rebuilt a carb before and this q-jet looks complicated.

Again, thank you very much! I will keep you filled on my progress, for sure.

sixth_sense676:
I started taking my carb apart today, and noticed that I have no aneroid assembly in the hole - just some little plastic insert. Sorry to sound so amateur, but is that normal?

I ordered Cliff's book about a week ago, hopefully I will find all my answers in it, but until I get it, I need to bug you guys! Sorry about the bother and thanks in advance!

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