Apologies. Bit of a brain fart.
The only crew cab rear seats with a fold-down armrest I know of, after more than 20 years of messing with these trucks, are these...
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If this is style you have, all I can say is...
You dawg! I want it!
YES! It will absolutely work.
In fact, there are a couple of members here, (One has a red truck) that have that exact seat in their RCSB's, from the factory.
I've been keeping my eyes open for one since I found out how rare-ish they are, years ago, after I passed up on two different ones a couple of years apart.
One leather. One cloth.
For $100.00 each.
...and they were
perfect. Arrrghhh!
But Canada. We don't have the part selection in the P-n-P's you guys south of the 49th have, seeing as the country's whole population is the equivalent of California's. Comparatively, there wasn't a whole lot of these trucks here to begin with, let alone crew cabs.
There are a couple of things that make them different when used as a front seat.
The rears have no tracks.
Yes, your's will bolt on.
The risers may be different heights. I've never measured them. Best guess is that the front risers will be the right height.
Grab the rear risers if possible. If those rear risers fit the contour of the front floor pan & they actually are taller/shorter, you'll have the option of heights as you prefer.
The risers in this pic certainly do look shorter than the front ones.
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I do believe that the individual backrests do recline, although that may be restricted internally due to the proximity of the rear cab wall. They may not lay back as far as when they are used as a front seat.
Some come with a lumbar option. 2 wire install.