Uck, no. That doesn't look anything like a rallye wheel. Maybe almost like a D-slot mag or something, but no it doesn't look right at all, in any regard. Sorry
Dudes are always saying "look at these big wheels, they look period correct", but no. Big wheels look all wrong on these trucks. The size of the wheel openings and the sharp squared off body lines make it clear these trucks were designed with a certain size wheel in mind (as were most cars in that time period). Anything bigger than 16-maybe 17 looks all wrong no matter how one tries to justify it or "hide" it. Just get normal size wheels and live with it. Why all the effort to go bigger? We've already established they don't look better, there's really no performance gain, and tires are more expensive. Why people obsess over cramming bigger and bigger wheels on these poor old trucks (or any old vehicle) is beyond me, I'll never understand it.
But yeah they don't look right at home any more than an Eskimo does in Miami.
If people hate the wheels/engine/interior/headlights/etc of these trucks so much, then why drive them in the first place? Does the awesome rectangle styling draw people in with how sexy it is? Obviously not. I really don't get it. People buy a square then rip out the seats and put in leather buckets, put in a custom dash with a double din touch screen stereo with digital gauges and vintage air, throw on a set of 20s, rip out the 350 and throw in some lame 5.3 LS, then complain it doesn't have the ride quality of a brand new sedan. I just don't get it. Enjoy the vehicle you got. If you hate a square so much, then why get one? They're not "cool" or "collectible", owning one doesn't make you "gangster" or "hip". I like my square for what it is, if I didn't, I wouldn't own it. Sh!t is silly to me... A pickup from the late 70's-early 80s belongs on 15s or 16.5s, that's really it. Sorry