Let me Inform you about the 72 Challenger Rallye or referred to as the Challenger 340 MAG RS. Granted as you stated the 400 6 Packs and Hemi R/T's T/A's where History but Chrysler Embedded the Soul of the Challenger in the 72 Rallye and may have carried a few into 73. Nothing sadder was to see a 318 SE but believe it or not they could be ordered with 4 Wheel Disc Brakes and where detailed much better.
#1 Very Low Production Numbers #2 It had the 3” Hemi-Exhaust System. #3 although it had the smaller Valved “J” Heads compared to the “X” heads with a weaker HFT Cam, the Engine could easily be updated to the 69 “X” head, run a Crane SFT Cam. The Stock Corked X and J castings where capable of revving 7200rpm but if you spent the money for W2 8000rpm Heads with a Crane SFT using the old 263 Rockers. Plugged the Rear Main Oil Journal and cross-tubed the Lifter Gallery, 425Hp and 8000rpm where at hand. If you didn’t do this #6 Rod Journal would surely RING and it wasn’t because of insufficient Oil Capacity.
To Top it all off it was Donahue and the AMC Javelin that Ruled the Roost back then.
Ever notice the Chime Line of the 72 Front Fender - It was Rounded and Bold like the Initial Models and NOT Squared like the 73 and 74 Models.
The Challenger was 800 lbs lighter then a Camaro, it didn’t matter what engine was in the GM Product, a 72 Challenger Rallye or RS (as it was referred to) would Walk-Away peeling G 60 P295 T/A’s at any speed. I’ve correspondence from Atherton & Walters and Smokey Yunik about the W2 340 Build and believe me Power to Weight Ratio was Insane for a Detroit Ride.
In my opinion, it’s just too bad that the Cuda and Challenger Body’s are Tinfoil., but I loved that Torsion Bar Front suspension and Pod Rear End ;o)
I ran that 7200rpm 340 for 3 years and put 75,000 miles on her traveling Coast to Coast no Vette, Chevelle or 427 RCMP 4 Door Chev Cruiser could out handle or approach me.
MIKE. You “Goggled” and got that same PIC as I did for the Challenger Rallye (referred to as the Challenger RS among Mopar Enthusiast ) and got the same result as I did – I don’t normally HACK TC Members but you have been TOPPING my POSTS with vengeance when all I have been doing is disusing Interest about the Muscle Car Era: In this Matter I rest my Case and will not permit you too do so in the future without Rebuttal ;o)
I will further point out that the Challenger/Cuda Design was Stolen by Chrysler over the success of GM's 1st GEN Design and they did it better in my opinion for $1,000 less and 800lbs lighter. The 2nd GEN was indeed a GM afford to Design a Total Camaro Concept that successfully lasted for 12 years rather then compromising a re-skinned Nova - It's just Detorit Automotive History and nothing MORE.
Believe me I love the the 1st GEN Camaro but I also Love the Cuda/Challenger concept. When the Cuda came out everyone gather around the Start Line to question if it wasn't a 1st GEN Camaro because they look so much alike.
I'm also a big Fan of the Mustang BOSS, Nova II or Acadian depending on which side of the 49 Parallel one resides on and tend to let the Intermediate Rides like the Chevelle/Road Runner Class Enthusiasts to themselves.