3.8L: The 3.8L shares the same block with the 3.3L year-by-year. The only difference is the larger bore. The 3.8L never was used in the LH cars, though, so the two extra bosses on the right side (that’s on the back side when the engine is installed transversely) of the ’93 and later 3.8L castings are always machined down almost flush with the block, too.

There have been reports of significant core shift on all of these blocks, so it can be risky to bore the 3.8L blocks very far oversize. It’s better to bore a 3.3L block up to a 3.8L standard than to bore a 3.8L block oversize unless you check all the cylinders with an ultrasonic tester to make sure there aren’t any thin spots that will cause problems.

There are some main caps that have a wide groove for the bearing tang and others that have a narrow groove. If you use the bearings with the wide tang, you may have to file the cap to make sure they will fit from time-to-time. If you use the ones with the narrow tang, you will have to crowd the tang to the front in order to position the bearing correctly in the wide slot.

The 3.8L rod is shorter than the 3.3L rod in order to compensate for the longer stroke with the same deck height. Look for a 4448904 or 4654356 casting. There have been reports of a few 3.8L rods literally breaking in half , so they should all be carefully inspected and probably even Magnafluxed.™ And, if there’s one broken rod in a motor, it would be wise to double check the rest of the set or throw them all away to play it safe.

Chrysler introduced a whole new family of 60 degree V6 engines beginning with the 3.3L OHV in 1990. It was followed by the 3.8L OHV in 1991 and the 3.5L SOHC that came out in 1993. All three of these engines have performed well and provided good service, but the industry continues to change so quickly they were soon replaced in the cars by another family of SOHC and DOHC engines that were introduced in 1998!

Introduced in 1990, the 3.3L was the first Mopar designed and built V6 engine to see duty in front wheel drive Chrysler vehicles. [A 3.9 liter engine, based on the LA series V8s, was the first Chrysler made V6, but it only saw truck duty.] The 3.3 was even successful as a 255-horsepower racing engine (as used in Shelby Can Am cars).......

The 3.8 New Yorker/Imperials is slightly more powerful and are much better from dead stop (idle) to highway speeds. The local ricers try to hide from the 3.8s as they are surprised by the power of a stock, heavy car....

Jim Gathmann wrote: "when the 3.3 and 3.8 were tested for turbo applications, the engine blew its self to bits.

The problem was that the 3.3/3.8s would literally break apart on the bottom end during what Chrysler has called 'moderate boost.'"

The "Dauntless" 225 V6 engine was introduced in 1966 in the CJ and C101 models. The V6 configuration of the engine makes it very compact which is a big plus in tight Jeep engine compartments. Kaiser purchased the tooling to build the 225 from Buick and later, AMC sold the tooling back to Buick.

Type and Description
Six-cylinder, 60° V-type, liquid-cooled. New US-engineered engine based on a proven basic design.
Displacement 230.5 cu. in. (3778 cu. cm)

originally the plan was to produce two versions of this race car, a 255 hp version and a roughly-500 hp model, the 255 hp version being the entry circuit.

since the circuit did not do well enough, the 500hp version of the circuit never came to exist.

Internally, the engine uses forged rods, J&E Mayle pistons (which make 11:1 compression ratio), a forged crank, and a slightly different cam. The valves were slightly bigger, and the heads were ported and tuned by Shelby's shop. The Can-Am engine had a special Shelby Dodge upper intake manifold, a special Shelby Dodge throttle body with twin intakes (pictured), and a special version of the Mopar 3.3 PCM (which had this engine redlining at 6800 rpm).The exhaust system
is pretty much just high diameter, low restriction tubing with larger exhaust valves. Fuel used is 100 octane (unleaded), however I have been told that some of these engines did run higher octane fuel at the track.