[EvilAngel]

Just my opinion, as i'm planning a daily driver yet a bit powerful type 1 engine for my GL project

If you want to have reliable pistons, you can only choose between 90.5 and 94. This is because their cylinder wall thickness is the same as stock. The others are thinner. If you want torque, you must go with a stroker, i think a 78mm crank would be a good option, since no major modding to the crankcase is required, only some clearancing. AA are chinese, but some say they're true forged, unlike mahle. About the camshaft I'd go with an engle 120 or equivalent, with 1.1 rockers. If you've got more buck, you can get an fk-8 and a set of 1.4 rockers. 90.5 x 78mm, that would make it more reliable because of the lesser stress on the valvetrain. 044 P&P heads are perfect, maybe with 45 x 35.5 valves, depending on your engine displacement.
The straight cut gears only add noise, which some guys seem to like. Someone said once at thesamba that it was like adding baseball cards to your bike's spokes. The lighter flywheel is a must. As for the carbs, i'd go for 44 idf webers for anything above 1776cc, don't get the ict's unless you are not increasing the displacement very much. Whatever ignition you like, as long as it's pointless, and a proper sized header, depending on your heads' flow. You might also need an external cooler to increase the engine's lifespan, in case you use big displacement or a high compression ratio.
BTW revving a vw makes it lose useful life, so it loses reliability in that sense. That's why I'd go with a stroker.
I'm planning my 2007cc, btw. Oh, and you should read the tech articles on aircooled.net for more info.