Lovely... Love the related video of the black Rambler Rebel too... You're right.. Very unique and deep; similar to the Hemis.
Funny enough, if AMC was in production today, it would probably be using the current Chrysler Hemi engines which also have a unique and deep sound... LOL.

To me the Hemis have the best noise among the modern engine lineup..
But I wonder which would have the best noise if we were to lineup the SBCs, Ford Windsor V8 / Cobra Jet, the old Hemis and the AMC V8s...

Finding and build an AMC engine probably is probably extremely hard and probably might cost.

Some AMXs also had a 327, no relation to the Chevy version.

Jeep was weird, they had some parts from all of the Big 3 in them for a long time after Chrysler took over, not to mention the AMC parts that were left from when they were closed down. AM General, I heard, was GM and AMC working together. I think it is the only surviving remnant of AMC, if that's true. My uncle was in the motor pool in WWII. He said the Jeep name came from the Army's gift of shortening everytihng. They started without a name, then were called "GP" for general purpose vehicles, then that got shortened to "GEEP". How they got a J is anyone's guess.

The oddest combo I've ever seen was in a 63 Pontiac Tempest. Half a 389 V8 up front with a torsion tube back to a rear independent transaxle (from a Corvair). The torque converter was under the trunk.

Not a big horsepower combo, but just very weird.

Kaiser-Jeep used a Buick 350 named the "Dauntless" engine in the 69 Wagoneer. Was not aware of a 327 used in the AMX's but some of the pre-69 Wagoneers did come through with Chevy 327 engines. I don't know at what point AMC start building they own engines. I do know that they used Mopar 727 transmissions in some apps. Just renamed "TorqueCommand" rather than "TorqueFlite".

Yeah Ripper those transaxles in the early Tempest were a PITA to work on but the little cast iron 4 cly was bullet proof. They were the forefather of the "iron duke" engines.

How about an opposed air cooled six cylinder? (not exactly forgotten) Seen in vans from time to time.

Here's an engine that was available in First Gen Chevy vans. I've never seen (or heard of) one so I can only believe they must have been rare.
(This one has custom covers.)

Seen a bunch but didnt know the put it in a van. Postal jeeps used those for years. I had one and man it took one hell of a beatin. They were used in boats alot to. Im lookin for one to build a new trike.

Mercruiser Marine also used that engine, it is little brother to the Chevy inline 6.