Hi BRAAP, it might be interesting to bounce some ideas off Johnny at Johnny Z Motorsport in Salem.
He was at the last Northwestz meeting, and he said he's done quite a few of the LSx swaps (LS1, LS6, LT1 etc) in a Z32.
His shop is very near to Ztherapy, and he's open 7 days a week (503)400-0790.
Hope this helped...