57 Chevy Gasser

57' Chevy Gasser

                                                  Old School Sleeper


Air Cleaner adds 30 horse power @ back wheels:  Air cleaner built by CK at Underpressure Power & Performance added 30+ hp, 1000 rpm sooner. Tests performed on chase dyno with hood up, open carb  green line. Second test air cleaner installed hood down, red line. Additional information available at (ck@uppcos.com)







What’s under the 327 valve covers:  1968 GM .060 over 350cu in. balanced, aluminum heads hand ported by the late Gary Pace @ American Speed Shop. Degreed Comp Thumper cam, roller rockers, Flame Thrower distributor, hand cut piston rings, Port Matched aluminum Air-Gap intake (for today’s fuel)


Loosing Weight:  Aluminum heads, intake, radiator and transmission.

No Front bumper

No Vent windows

No Radio or dash speaker

No Dash clock, cigarette lighter, emblem

No Grill Bar/turn signals

No Hood/trunk emblems

No Trunk mat or bumper jack

No Spare tire


Cooling: Sealed engine compartment at radiator support & hood cross brace (stopping   hot radiator air short cycling at idol and aids air intake to carburetor)

Afco radiator, radiator cap temp gage, fan shroud, flex fan, hood lovers, tube grill

2 ½ Flow Master Exhaust Titanium wrapped/headers to H pipe

Front Aluminum Fuel Tank converted to Radiator Expansion Tank by Underpressure Power & Performance


Safety Modifications:

Dual master cylinder with proportional valve

Disc front brakes

Large 11” back drums with 2 ½ shoes, auto adjust

Retractable front seat belts

Line lock (red button on shifter)

Quartz headlights

Electric wipers

Drive shaft loop

Raised chassis scrub line

(NSRA Safety 23 compliant)


Additional information, pictures and specifications available at (ck@uppcos.com)





Air Cleaner: Filtered, dual inlet air box, velocity stacks











Fuel System: Edelbrock 1406 carburetor, Holley red electric fuel pump, street rod fuel filter, pressure regulator & fuel gage @ carburetor


Frame: One piece frame, car originally assembled in Oakland CA


Front Axle: Speedway straight axle, Chevy spindles, 4 3/4 bp


Differential: John’s 9”, 373:1 ratio, 4 3/4  bp, air shocks (mounted to shock relocation bar between frame rails)

Old School Traction Bars with spring crossover stabilizer bar.


Heater: Restored original deluxe heater and vent system


Transmission: Muncie 4 speed, Centerforce clutch kit


Tire/wheels: Hurst Racing Tires, Pie Crest Cheater Slicks P235/75R15, on 15” Kidney Bean Gasser Wheels back/front 165/80R15 on 15” ET Gasser Wheels


Paint: Sherwin Williams, Engine Orange & Adobe Beige

Paint provided by Tom @ ATR Collision