noooice engine
The updated ones put out some where in the region of 340bhp
Won lots of awards as well.
M54/S54 bring their own difficulties such as electronic throttle that you need to deal with. It's also a bit of an a issue with VANOS engines as I don't think megasquirt is up to dealing with variable valve timing yet which means stock ECU and EWS (but as I understand it its possible to turn that off).
There's a number of TVR V8's on ebay right now, they would awesome.