Terry- good to see you're in the Polo game again, castor is down to personal preferance, on my car I run as much as possible within tyre/front arch confines. Toe on Polos is usually 0 (i.e parallel) but on some track applications toe out can be normal.
Best thing to do is measure the wheelbase side to side, adjust so wheelbase is even (therefore castor angle- presuming the rear axle is straight) and have a play with it, enjoy the adjustment!
Crank timing, was out a fair way, probably 5' on the crank pulley (2.5' cam) but the dowels on stock pullies aren't good, you've probably got that much play in one when you refit it anyway! I've also got a 3f pulley and timing marker, the markers have some play in them too when bolting up.
Cheers
Pete