Chrysler being the smallest of the big 3, probably had the tightest budget as well.
That's what I admire about them, they seem to have done so much with so little.
Every mfg. had some neat packages & that was good for competition between them.
I didn't start driving until 1975, so I missed the Muscle car days.
But it did allow me to buy several different MoPar muscle cars in the early 80's before the prices started to rise.
The most common thing I noticed, you would rarley find a Chevrolet performance car with it's original powertrain in it.
Most big block cars had small blocks in them by the early 80's.
Pontiac's were better, but not by much.
The Olds engines seem to do better.
Fords were hit & miss, the small blocks seem to be slow & the big block stuff (390) was average on power.
I did get to ride in an original 428 Shelby Stang, could have been the tuner, but it didn't impress.
I street raced a couple of friends with a 390 GT Mustang & Boss 302 Mustang.
Cleaned their clocks with my 340 Dart Swinger.
My point is, most of the MoPar stuff I came across, still had their original powertrains in them.
So, in my opinion, the MoPar's were more durable than the rest of the other Performace manufactures.
I think that Chrysler's enginering gets a little lost when comparing it to other makes.
It seems that alot of small block chevies that are in my ET range, have to do it with aftermarket heads & rods,roller cams, lots of compression & 4-bolt mains.
I ask, where is the better mouse trap?