GT350son

I'm building a 347 stroker with
225cc AFR Heads
Lunati Cam retrofit - Duration 300 int / 310 exh, Lift .560 int /.576 exh
Edelbrock Performer Air-Gap

And would like to know what size holley carb you guys suggest.
Its going to be a street/heavy strip car
Thank you in advanced

67mustang302

Like I said in the other thread, it depends on the carb and how you plan to use the car. If you're really concerned get an 850 with annular boosters and it won't have problems.

GT350son

Just posted in this section to see if anyone here had any input. And yes I have been looking into a 830cfm annular

67mustang302

Get a mechanical secondary though. Easier to tune.

GT350son

Probably gonna go with this one.
http://www.summitracing.com/parts/HLY-0-9380/

67mustang302

http://www.summitracing.com/search/D...e/?Ns=Rank|Asc

About the same money, or slightly more, and you'll get a MUCH better quality carburetor with far more tunability. Holleys are made of zinc, which is potmetal....so they weigh a ton and can get more easily damaged, whereas the QFT(or equivalent) are made from AL alloy. And they all come with at least good downleg boosters, some with annular...whereas most Holleys come with very old style and less effective straight leg boosters.

GT350son

What's the difference between Holley and Quick Fuel?

67mustang302

QFT's have better boosters, with 2 booster options(downleg or annular). Holley's are usually just straight leg(crappy), sometimes downleg(rarely annular). The Holley 4150HP you can change jets or air bleeds, standard Holley's jets only. All quick fuels come with changable jets, air bleeds, idle feed restrictors and power valve channel restrictors. All QFT's are also pre tapped in the metering block for changing emulsion with restrictors(just drill out the emulsion hole and drop restrictors in), and some come pre-set with emulsion restrictors already.

That and the metering blocks are billet on the QFT's, the throttle plates are also billet, and the bodies are cast aluminum. Holley's are made of zinc, which is about 2-3x heavier and zinc is basically pot metal(cheap and easily damaged). QFT's also come with actual glass sight plugs for setting float level.

And QFT has good customer service.