UPPER CONTROL ARM EXCHANGE QUESTION

What kind of crap is this....?
"9" drums were not available starting in 1974 according to any of the factory literature. You believe the factory literature for everything else, so, I don't see how it's not valid here. According to the factory, '74+ were all 10" drums, and those had large ball joint spindles and UCA's. If the books are wrong, show us the evidence.

I believe the factory literature> Where did you arrive at this conclusion?
According to the factory, '74+ were all 10" drums? Uhh...NO, many were disc brake cars.
Evidence?
I'm not claiming to believe everything that I read. Books have errors. Back when these cars could be found in great numbers in the wrecking yards, I recall seeing later model Beak Darts and 73-76 Valiant/Dusters with 9 inch drums up front. Not all of them, just some. I also owned a 1976 Dart 2 door with a slant 6, an automatic and 4 wheel 9 inch drum brakes. That car was so basic, I think the carpet and automatic transmission were the only options.
Now, before I owned that 76 Dart, it is possible that the car may have been a disc brake car. To get the car to the way that I owned it, someone would have had to swap over the upper control arms, front brake assemblies, master cylinder and proportioning valve/distribution block, rear axle and maybe even a drive shaft. Yes... all of that to put an ugly green slant six Dart back on the road.