I may be late seeing this, but as someone who converted their own wedge to V8 (courtesy of S & S kit back in 1991) I can follow the sentiment.
http://www.hamilton-motorsport.co.uk/ac ... _-Kit.html
We had a Mk2.5 MX5 1.8iS a few years ago and a Mk3 launch model is my current daily driver. Both engines like being revved.
The Lexus 400 engine option looks like fun. How long before someone develops a performance electric motor / battery combo for the wedge? EV's will come eventually......