I have a custom crossmember for 4.3 and small block as well as the matching trans xmember

Here is a L67 mounted in a Holden (they came stock)

I really do not want to sound stupid but I guess more research is needed on my part. From what I've seen in shops the intakes for the states stuff is on the rear of the charger
and may pose an install problem for me. If I will have to import stuff I may just as well go back to the 4.3 v6 instead, to much $$$$ for the import parts.

Holden my be GM but parts in the states r going to be the deciding factor here. I love the look of the system tho.

With the amount of room you should have, I doubt fabbing something to the rear intake would be a problem. It'* a matter of thinking in a different fashion because it'* not normal to see it that way.