It can be a real crap shoot to install the offset bushings. In theory, you should have had the alignment checked before taking the car apart to see if you could get it where you wanted it with the stock bushings, and that would also tell you how to clock the offsets if needed. Unless the car has a billion miles on it or has been crashed in the front, I'd just go with the standard bushings for now. If there's a real problem with getting it aligned, then I would install the offsets where needed. If the alignment tech knows his stuff, he can tell you how the bushings should be oriented, or I could too once I know where the adjustment maxes out at. I put offsets in my '72 Fury wagon in order to dial in extra positive caster because I was installing 255/60-15 tires on it, but ended up learning that the C body front suspension just doesn't like a whole lot of caster. I was up around 3-1/2 and it made the steering overly sensitive.
Jeff