2019 summer race.... Jadaharabi vs 318willrun

I doubt I go the 220.00 dollar route.... I still haven't even decided what Duster I'm even going to use... LOL. But by digging through my junk, I did find the heads, intake, and cam that will be used. And I'm leaning towards my free Tri-Y's that somebody was going to throw away, and an old B-body 8 3/4 rear end I've had for years that somebody dumped off on a trade.. (why do my projects always end up like a Roadkill episode... :D ).
I don't know why there's some big race to shorten rear ends and Tuck tires way underneath cars? I have ran an ebody width on my eighth and a quarter 8 and 3/4 and my Dana 60. A b body width would not even be but an extra inch. take that $220 and buy some cheap Summit headers and good gaskets for goodness sakes and stop trying to do a Roadkill episode every time...