Lowering the front end is more involved than the back - since it's not factory adjustable the usual way is to cut the beam and weld in an adjuster. How much you can drop depends on things like rims and tyres, but you can usually go down 2 inches no probs. You can also put on dropped spindles that lower about 3 inches on a standard beam, it's a bit more expensive way to go and usually ends up widening things so rims and tyres come into it again.
67 and 68 bugs are a bit different in the front beam (similar design, but different dimensions) so be sure of what you've got before buying any of the parts for it.
VWDCQ vice pres & web dude - vwdcqinc.org.au
Join a car club - get car peeps
My toys
'70 Hillclimb Bug 'Jezebel' w/- Haltech EFI -
http://bit.ly/VwTNtQ
'60 KG Coupe - resto kinda started
01 New Beetle - gf's car, but I turn the spanners