I really like Marc's - very clean installation.
Here's mine, an LS LM4 aluminum 5.3L. Ironically, it is the same engine as used in the Advanced Design inspired (and a bit cringy, IMO) retro-styled SSR Chevy truck.
Mine has a LS1 intake and all accessories are off an LM7 from a Suburban, including PCM and harness. Marc's looks a lot more 'period correct' that would be a lot more fitting for my truck. Inspirational