quick quetion about a drop

[allout]

I am planning of buying a drop for my 69 lwb pretty soon, i wanted to do a 3/5 or a 2/4. i plan on running 20" wheels. I was wanting to know what is your opinion on 3" front drop springs? i think i remember some people saying that they are hard to align, or something like that. i would love to do a disc/drop spindle conversion, but im on a pretty tight budget as of now. if i was to go with the 3/5, i wanted to do the ECE rear kit, and CPP front springs. if i was to go with a 2/4 i would just do the kit from ECE. so what is your opinion on the 3" drop springs? any help is appreciated.