25-Years-Owned 455-Powered 1968 Oldsmobile Cutlass S Convertible

Description

OFFERED WITHOUT RESERVE

In 1968, GM’s A-bodies were restyled with rounded sheet metal, longer hoods, and shorter rear decks. Available in pillared coupe, hardtop, and convertible body styles, the new generation rode on a perimeter frame with a 112” wheelbase, three inches shorter than the previous car’s.

Oldsmobile’s Cutlass S (a separate model from the Supreme) was aimed at the youth market and wore unique touches like hood louvers to differentiate it. The S was powered by a 250ci six-cylinder, or a 350ci Rocket V8 in two-barrel 250- or four-barrel 310-horsepower variants, and backed by 3- or 4-speed manuals or a 2-speed Jetaway Drive automatic.

The seller has owned this Cutlass S for 25 years, and states that the factory 350ci V8 has been replaced by a modified, professionally-built 455ci unit. Its front and rear suspension and steering system have reportedly been rebuilt, the interior has been refreshed and upgraded, it wears aftermarket 17” wheels, and it was recently refinished in Sangria Red Metallic.

This tastefully-modified Cutlass S Convertible is now offered at no reserve with its factory 14" wheels, some spare parts, and a clean New Jersey title in the seller’s name.

Highlights 

• Unique ’68 Cutlass S drop top with custom paint and 455 V8 power 

• 455ci Oldsmobile V8 professionally rebuilt by A&A Engine in Wharton, New Jersey 

• 3-speed TH-350 automatic transmission with new lines and Dual Gate shifter 

• Refinished in Sangria Red Metallic with black interior 

• Black convertible top

• Fiberglass hood 

• Refreshed suspension and steering 

• Refreshed interior with PUI Interiors seat covers and foam 

Factory Equipment 

• Coil-spring suspension with front stabilizer bar 

• Optional power front disc brakes 

• The chassis number (336678M407373) decodes as: 

  • 3 – Oldsmobile  

  • 36 – Cutlass V8 

  • 67 – 2-door convertible 

  • 8 – 1968  

  • M – Lansing, Michigan assembly plant 

  • 407373 – Sequential production number 

Modifications 

• Rebuilt 455ci V8, including new crankshaft, camshaft, timing chain, rings, and oil pump 

• Edelbrock 650-cfm AVS2 carburetor 

• Long-tube headers with side-exit dual exhaust 

• Aluminum radiator  

• Dual-snorkel air cleaner with cold-air intake tubing 

• Complete M&H Electric Fabricators wiring harness 

• 17” American Racing 5-spoke wheels wearing 245/45ZR17 tires 

• Drilled and slotted rotors 

• 455 hood emblems and blackout trim 

• Aftermarket steering wheel  

• Custom door panels, center console, and shift knob 

• AutoMeter 8,000-rpm tachometer, oil pressure, coolant temperature, and voltage gauges 

• Kenwood AM/FM/CD player 

Servicing & Documentation 

• 2024: New spindles, ball joints, center link, wheel bearings, brake lines, suspension, and sway bar bushings 

• 2020: Bodywork and paint, bumpers, mirrors, door handles and locks, seat covers and foam 

• 2011: Engine rebuild, wiring harness 

Known Imperfections 

• Needs alignment 

• Transmission pan leaks 

• Tear in the convertible top on the driver side  

• Driver side door sags and needs new hinges 

• Rear inner fender has a hole into the trunk compartment

• Replacement floor pans installed over originals approximately 20 years ago

Ownership History

The consignor states, “I have owned this 1968 Oldsmobile Cutlass S Convertible since 2000. I bought it from the original owner’s son, so supposedly I’m the second owner.

“I was told it was always garage kept, and I’ve kept it in the garage ever since I’ve owned it and never drove it in the rain. It’s been a summer-only car for the family.”

Included Items 

• Factory 14" wheels

• Chrome trim for front wheel opening, trunk, and hood

• Various small parts, nuts, bolts, body shims, etc.