And don't think I've not looked at it....The is a firm in Brum that do LS V8 conversions, they've done them in TVRs, BMWs and RX7's...I can't for the life of me think what they are called, it will come to me...might be dyno tourque or something like that.
When i looked at it you were looking at 10k for an LS2 drive in and out.
Let me know tye name when it comes to you. From what ive read it's a tricky job due to most LS V8's being lhd setup