Hurst competition plus vs OEM hurst?

I'm not sure what you mean by not a "normal" Comp. Plus shifter. That shifter is marked Hurst Competition Plus on the side of it. It was installed in my Dart new back in 1974 with all the parts just as shown in the picture.
The picture that you posted from Brewers is a B-body shifter set up. A whole different bear. The B-body shifter was mounted way forward on the tranny tail piece. Hence the shorter rods and the longer handle. I'm not saying that the short 7" shifter handle is a A-body one. That was the handle that came with the shifter kit when it was new.
I'm talking about "back then" if you waltzed into a speed shop and bought an off-the-shelf Hurst CP to fit your car. It did NOT come with the huge reinforced straight shift rods. The shift rods resembled the ones depicted in the factory manuals.

The shift lever you could buy separate. Whether it got installed with a straight lever or S curve is too hard to track down. The only REAL answer is if one of you could come up with a "seventies" Hurst catalogue, and even then some of the photos might be "representative"

The B body shifter in the brewer site is EXACTLY as I remember the Hurst shifters I bought for my 70 RR, and for my 64 426 Dodge.