Jet Performance 850 Holley

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Holley 850 cfm – Model # 4781-S
Double pumper, mechanical secondaries
Jet Performance Stage 3 modifications http://www.jetchip.com/products.asp?pid=23035, including jet extensions and vent whistles, milled choke horn, annular boosters, center hung floats, clear sight plugs, helicoiled main body.
50cc secondary pump
30cc primary pump

#31 shooters pri., #31 sec. Pri. idle air-.073, pri. high air .032, sec. idle air .073, sec. high air .032. Accelerator pump cams – Pink, #2 screw primary, Brown sec. w/50cc secondary pump.
Primary metering block power valve channel rest .067, power valve 6.0.
Secondary metering block power valve channel rest .067. Idle feed rest .037, power valve plugged.
Current jetting 80/87.

Proform billet baseplate installed. Original baseplate included.

Carb works best on motors 450-500+ cubic inches with 230 degrees or more camshaft duration @ .050.
Jet Performance build card included. Carb looks and runs like new.

$385.00, plus shipping.

Bill Meyer
wgmeyer@sbcglobal.net
SPF1735