Just a flag for this forum (As the Main place for the uneducated / educated few ) as un-biased place for MR2 thought.
You can bring it in from the UK or US, but its all sound here.
Personally I can't recommend more than souls like
http://www.woodsport.org/joomla/index.php (as far as i'm concerned Paul Woods is THE MR2 specialist for V6 conversion worldwide. The information this man provides free of charge + advice is outstanding. If the was an medal for Service to Old C**ts driven Ricey Cars) ((Which apparently there doesn't happen to to be i'd cast my got for PW)) as this man chucks his advice about freely.
I wanted to do a V6 conversion but other agenda interfered, without promise of financial reward PW answered questions. PW is 'the' MR2 specialist. He's been there and done that. and when 'that' has failed badly - you know what? He'll tell you and the whole damn world. Cos' if it don't work for PW it won't work for you unless you are a magician, and if you are a magician well if just a dyne slieght of hand...
(Provisio- I Really don't know of any Dyno magician types - my observation is to suggest that Paul Woods style of business and help to the MR2 community worldwide is quite 'Magic' he's basically electrified the Australia Community Praise To PW.