But if its an st185 or st165 probably not as easy choice.
You'll have difficulty finding an mr2 half cut that late model...
MR2 has the alternator mounted at the back of the motor, gt4 at the front.... considering the angle of the motor this may make it more compact if using the standard brackets for the ancilaries.
GT4 intercooler is top mounted - dunno if that will be any use.
MR2 is smallish, but mught fit in the front of a '22.
An MR2 radiator would be a good find, low profile, might fit quite well.