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Rochester Quadrajet 17058229 1978 CHEVROLET/GMC 400/454..Condition is Remanufactured….no core charge…ships immediately.
...modified idle, part throttle and full throttle for performance/tuner.
...single main air bleed version...nice core...fully disassembled...sonic bath...every passage opened with fine wire and shop air.
...throttle shaft bushings line-bored and replaced with Oillite 5/8” bronze equivalent...stainless steel screws and Locktite on reassembly...throttle blades indexed/synchronized to factory positioning in both bores...rock solid and very smooth throttle movement.
...primary and secondary fuel well plugs tested/sealed with epoxy.
...base plate factory sealed APT plug and screw carefully removed and replaced with a external screw. This allows exterior adjustment to the part throttle air/fuel ratio by taking advantage of the primary rods taper...Nice tuner mod.instructions included.
...idle mixture holes enlarged to allow full range of idle air/fuel mixtures.
...slightly modified idle tubes and idle channel restrictions…accelerator shooter holes enlarged and verified to spray two solid streams... accelerator pump duration shot linkage added to allow fast changes...secondary air flaps "notched" to allow instant spray under full throttle...secondary POE holes enlarged for a richer initial shot of fuel...secondary fuel well restrictor holes enlarged for faster refill...secondary emulsion tubes and channels slightly enlarged to eliminate the “dog-leg” restriction....CFM limiter tab modified for maximum flow and a adjustable set screw added to allow any CFM setting...these mods will eliminate any lag/bog under full throttle.
...primary jet 64..primary rod 39B..
...secondary rod DG…hanger K… stock calibration.
...rebuilt with high quality kit including new float , .130” needle/seat, hi-po ethanol resistant blue seal and garter spring accelerator pump, thick gaskets, tested /polished secondary/choke dashpot ...fuel filter with fitting/o-ring/spring..baseplate and air lid gaskets.
...common divorced choke set up used on just about every 1973 to 79 Chevy/GMC car and truck.
Painted with high temperature aluminum paint...baked three hours…very nice.
...shipped by USPS PRIORITY MAIL (large box)...double wall of cardboard…finally, plenty of room for one inch thick total foam/sponge protection…usually delivered within two to four days.
...any questions reach out anytime.
