You give too little information to give any help.
It is probably likely that you will get very little from this thing and the loss in the 70ft of wire may be no big issue.
As others have said, auto alternators are not ideal for wind power. You give no idea of blade size or anything else so it is impossible to even imagine what you might get, but unless you use large blades and a suitable speed increase ( which you may be implying by mentioning a pulley)you will never see much out of it.
There is a lot of doubtful information out there and I suspect you have found some of it.There is information here about the problems of using vehicle alternators if you search.
I wouldn't spend any money on batteries or inverter until you can satisfy yourself that you can produce enough to justify the cost of them. Unless you remove the internal regulator that length of cable will reduce your output to negligible currents and cause overspeed problems.
Flux