I want to do the same to my TA22. I have purchased the in cabin bits from a TA22 and all the engine bay bits from a 3TG powered car. I was going to mount the condensor directly beneath the radiator support panel and put the intercooler forward of that. I am a little concerned about this impeading airflow to the radiaitor, but with a larger aluminium radiator, shrouds and big thermo fan it should be ok.
If you do go ahead with this let me know as I would be interested in the result. It will a while before I think about aircon, as I havn't even finish the engine yet.