I own a 4th gen. mirage and that is the swap I was going to do until I went a different direction. It doesn't cost much for the engine swap because you can use a stock 1.8l mirage trannny up until mild mods. If you use the 1.8 tranny all you need to do is swap ecu's, weld 1 new engine mount, and do some fuel system work. the best mirage for this swap is 4th gen mainly 93-95, because the side te tranny is mounted on (if you ue stock tranny). on the newer moldes the tranny is o the driver side. here is a link for how to do the swap. http://www.boostaholic.net/phpBB2/viewtopic.php?t=6
all you have to do is search this forum http://www.boostaholic.net/phpBB2/
to find a step by step with photos. If you want to do a original swap in the US why don't you go with the 1.6l mivec(mitsbishi vtec) engine swap. If you need any more help just PM me and I probally give you alot of helpn how to do it.