I'm not up on all the Toyota engine numbers, but I assume you're talking about the 4A-GE motor. That's a great motor and it's a pretty popular engine swap, but I've only heard of people linking it up with one of the Renault gearboxes (NG-3, 365, etc.) rather than the Toyota units which makes the swap a lot easier. That's not to say your plan is impractical. You might want to talk to Richard at Banks (banks-europa.co.uk) as he has done lots of different engine swaps and probably knows more about Europas than anybody.
Good luck and keep us up to date!