He has a Gen1.
I've looked into putting a 4.6 2v 75mm throttle body onto my LS as far as confirming the bolt patterns are the same and tps look to be the same. The linkage however as far as throttle and cruize control are different, probably an easy thing to overcome, I just stopped toying with it at that point. The adapter behind it looks like it can be openned to match but again I haven't followed through with it. Small HP gain at best. But TBs are cheap so maybe worth while...