I run an engine that "requires tuning" and Garry did a fantastic job, nothing remotely Explorer about it. I must not be understanding what you mean by "Mustang stuff"?? I run a Moates Qtrhorse driving an A9l. He tuned my 418 yrs ago and now I run a 460 sbf.
Obviously nothing stock on it. Super Victor intake, large forward facing elbow, 80mm TB. At a quick glance it looks very similar to rcmbroncs install.
With that said, yes, Garry can easily tune "Mustang" engines, especially since he owns one and tunes it too.
rcmbronco- strut cross support can get creative as there is a lot of "stuff" in there! You'll do it right, your entire build looks "right".
Glad it's running good.