That didn’t stop this shop from stuffing the lower-compression street version into a 2012 GMC Sierra single cab truck, a vehicle which, as you may know, has almost no weight over the rear wheels. That must be a hoot to drive.
Plus, in the late 60s, Chevy didn’t use engines over 400ci in midsize cars this meant COPOs were far and away the fastest Chevelles and Camaros on the road. From day one they were, and still are, offensively expensive.
As if that wasn’t enough, GM then throws on a gargantuan 2.9-liter Whipple supercharger pushing a full 16 PSI of boost. All of that cast iron and forging means strength, and the COPO 350 can set dragstrip records day in and day out without breaking a sweat.
This has been but a taste of the vast GM Performance Catalog. GM crate engines run the gamut from affordable and economical four-cylinder mills to gallon-per-mile big blocks that sound like the devil gargling Listerine. And the future is bright: Chevrolet is bringing back the COPO Camaro and the newly-launched 2019 ZR1 packs 755 horsepower and a 210-mph top speed.
In reality, the roomy interior is full of odd shaped materials and cheap plastics that can easily turn anyone off. Oddly, as you move up the trim lines the Sienna loses ride and handling quality. The Sienna’s second row of seating does move quite a distance on its slide mechanisms, but the seats are quite difficult to remove if you want them out of the way for added cargo space.
Let’s start with the 9.1:1 compression, which means you can run this on pump gas. Add in a cast aluminum block, titanium valves, and a forged steel crank attached to forged titanium rods attached to forged aluminum pistons. Top that off with hydraulic roller cams, aluminum heads, and a high-helix supercharger pushing 10.5psi of boost.
The Chrysler Town & Country is basically a rebadged Dodge Grand Caravan with some added tech and comfort. Even in its lowest trim level, the Town & Country offers more refinement than a Dodge Grand Caravan. Still, as used minivans go, there are better models on the market today.
In fact, at highway speeds, the Grand Caravan is one of the noisiest used minivans around. The engine and transmission noise in the cabin can drive you insane if you ride long enough. When you throw in the wind and road noise that join the cacophony, you can see why this used minivan should never leave town.