Hey Rick, check out the guide to swapping Beams engine on the forum:
http://www.mr2australia.com/mr2play/tm.aspx?m=93280It goes over the pros and cons of half cut vs engine swap package, ECU auto vs man, air box solution. Many questions can be answered I believe :) (but keep asking if not sure)
I think the beams is the cheapest engine swap actually, maybe not a direct bolt on in terms of ancillary parts but I calculated parts altogether whilst doing mine to make it work which was $2500, add another 1k or 2k for labour. I messed around a lot but that was all avoidable and unnecessary, thus the guide lol. The dilemma of Beams vs turbo is in essence "power to cost ratio". People can spend on whatever they want but it's important your goals are clear.
I agree with just_ace here as it was the same reason I decided to buy an engine swap package from local. I believe items over $1000 internationally will attract customs (check tho) so it's already $4500 before it's even landed on your door step!! However the list of parts the half cut comes with does look very attractive lol, pretty much a drop in. Do you need everything listed? Not really. (If it had LSD that would be really nice, then you can sell your engine/box and maybe recuperate some dosh)
So I guess it's up to you to decide spending more money and less time fiddling aka half cut vs cheaper minimum package but elbow grease/labour. Because mine is a stock motor, having the SW20 Beams b-pipe would've been nice for me since it would take months of lurking yahoo japan. Custom exhaust ofc solves this but again $$
P.S Since you have a gen 3 already, your swap is actually cheaper than mine because you can re-use parts such as the b-pipe, water outlet etc.