425 V8 Project: 1967 Oldsmobile Cutlass Supreme
The Cutlass Supreme joined the Oldsmobile lineup in 1966 and would go on to be one of the industry’s best-selling mid-size cars over the next 30 years. It began life as an option on the Olds Cutlass but was quickly promoted to series status across multiple body styles. This ’67 Cutlass Supreme is a project that the seller has not gotten around to doing much with, so is for resale featuring an upgraded V8 engine.
First-generation Supremes (1966 and 1967) had the tunnel back roofline that would be soon emulated by others (like the Dodge Charger). It was a premium model compared to the standard Cutlass/F-85. As was typical of the day, the cars had a front-engine, rear-wheel drive layout that featured a 330 cubic inch V8 as the standard engine (but with a higher compression and 4-barrel carburetor; it was rated at 320 hp). The seller’s car now has a 425 V8 which would be transplanted from a larger Oldsmobile of the same era. Sales exceeded 30,000 units in 1966 but exploded to 93,000 the following year.
The seller bought this Olds nearly 10 years ago for purposes of doing a restoration. But other needs have arisen more recently, and the car needs to move on. The brakes have been worked on and the carburetor replaced. The interior is a work in progress that will need more attention. It was a running machine a few years ago but will need tinkering now, including bodywork beginning with the floor pans. Some spare parts will come with the sale which includes a new, uninstalled carpet set.
This Oldsmobile is currently registered in New York State, located in Williamsville. It’s available here on craigslist where the magic number is $4,800. Because the engine was changed out, the automatic transmission may have been, too, since it’s a TH-400. For more details and pics, check it out here on craigslist. Another vintage tip brought our way by Michell G.!
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Comments
What kind of power can the buyer expect from a 425 ?
My 65 dynamic 88 was rated at 310 hp with a 2 barrel, my 66 98 is rated at 365 hp. Optional duel exhaust is 375 hp. Toronado in 66 was rated at 385 hp.
Powerhouse Harvey. 425 sounds like a great mill from the laboratory of the good Dr Olds. 👍
The 425 was a well built engine, research it.
Lots of torque, and well balanced
Had a couple in 88 and 98’s from the mid sixties
Olds 425s were supposed to have a steel crank. It’s an over-square engine with a larger bore than stroke, should make lots of HP on the top end.
425 Olds is the best performance engine never put into a Cutlass. Torquey close to a later 455 with a slightly shorter stroke. Horsepower is comparable.
Well, sometimes “finds” should be put back in the barn —Really !
Most likely a 365 version standard in the 98 model.Hope for the Starfire 375, only rated 10 HP more but much hotter with 442 cam and trick valvr train.
Looks more like a 67
I have had both an Olds 425 (67) and an Olds 455 (70). They are fire-breathing monsters and have some of the best exhaust notes in history (in my admittedly very biased opinion). Neither is amazing off the line, but once you are moving and hit that sweet spot around 4500-4800 RPMs, you’ll pass anything but a gas station.
There was a fella that worked in a wrecking yard in the Fort Walton Beach Fl area that would take 455s and transplant them into his formerly 307 powered Delta 88. He said that when racing 5.0 Mustangs, (his favorite mark) the Mustang would jump off the line ahead. Then when the 88 hit second gear, the Mustang would stop pulling away. Third gear resulted in the Mustang being passed up like they hit the brakes. 😁
That had to hurt the 5.0 driver’s feelings.
1967 Cutlass and an Olds 425? Pretty cool combination!
Blew the engine in my 69 Hurst Olds back in the day. Found a 425 out of an older car and put in it. Not sure the horsepower and not as powerful as my 455 but it wasn’t bad.
You’ll be happy with it.
I would do a quick rebuild with the engine and transmission, contact some olds people for advice.
Unusual car and drivetrain, so no purists. but very kool hotrod so go for it!
you americans don’t know your quadrajets, loosen the tension on the secondary air flap with the 332 allen key, adjust the gap at the choke brake rod to about 3/16 th loose and you will blow those mustangs away, my son had a 69 bird with a 460 manifold and a 750 rochester and it burned rubber all the way through 1st gear. I was arrested on the F4 in sydney at 140 mph in my 70 350 supreme.