This one is mine mate, but we do these conversions, as well as just about any other engine conversion you care to dream up, for customers too.
For this engine in a Mk3 Mr2 you're looking at £3,500. Which includes :
1MZ alloy engine, new head gaskets and full engine detail.
Mk2 N/A gearbox
Turbo flywheel and hybrid clutch
Induction kit
Custom gear linkages and selector assembly
Re-worked engine bay, painted to colour of your choice
Custom engine and torque mounts
Custom downpipes to connect to backbox
All oils, coolants etc, any sundries required.
Takes me 3/4 weeks to do a full conversion but the results are pretty fecking awesome! And the value of your Mr2 goes up, can't say fairer than that.
I'll also put a V6/V8 in your Mx5, V8 into your 240Z (one day

) 2.0 turbo/V6 into your Peugeot, K20/24 swaps, just about anything you like.
Most conversions you're looking at the cost of the parts plus 3/4 weeks labour. It's the one thing that makes getting up in the morning worthwhile, transforming someones car and handing it back to them for the 1st time. Magic.
So if anyone's got a daft idea running around in their head, feel free to drop me a pm/email and i'll happily discuss options with you.
Should see some movement on here soon with a certain members car.