hahaha, that's funny, i've come to a conclusion that if you really want to know something you just have to do it yourself.
I hope my pcm doesn't fry someday, i'm using a z28 pcm and truck harness, oh no, lol
I've called them a few times also and sure they look good on ads and shit , and i'm sure they are very good at somethings, but if they don't know the answer i really wish they would say " i don't know the answer to that" that drives me crazy when ppl do that.
The pin out is probably a little different, but i'm positive the power and ground wires are the same, and plus, all the sensors are the same, there may be a few wires that are labled differently, but they perform the same function, a lot of the camaro pinouts label the wires differently, maybe MASS wire and MAF wire, something like that.
There's no reason to switch to the z28 pcm, your truck pcm will be fine, but it may need tuning. You have a bigger bore and are probably flowing more air than the pcm thinks, when i did the 5.3L to LS1 swap, the pcm i guess was close enuff that is idled just fine and plus you installed the ls6 cam,
maybe i can borrow your truck for a while and get it tuned just right, i'll need it for about 6 months or so, hahahah, jk,
let me know if i can help,
allen