what so you think it is worth

Oh yeah, all the other stuff Chaz mentioned too, it will need to be safe and reliable. I think I must have put close to $1000 into my '72 to get it driveable, and that was without tires (I already had some usable tires). EDIT: maybe it was closer to only $600 without tires. Either way, I don't really want to think about it.

You'd need to decide what you want to do with it. Leave it as a /6 driver, or put a V8 in it. If you decide you want to put a V8 in it, my advice would be don't bother with ANY of that stuff, just upgrade the front brakes to discs, and the rear, then do the V8 swap. Reason I say that is because all the $ you will put into getting it going as a /6 car is down the toilet once you do the swap, unless you have another car to use them on. Hardly any of it is the same, and no one will give you squat for it later, even if it's all close to as new. I almost wish I hadn't sunk the $ into mine as a /6 because now I feel I have to get quite a bit of use out of it before doing the swap to make it worthwhile. It'll be cheaper to cruise in for awhile though, so whatever. Anyway, that's my thoughts from someone who picked up a car nearly exactly like what you found there.

In case you're wondering, the reason Chaz and I can tell it's a 70 and not a 71 is because of the position of the emblems on the quarters rather than on the fenders.

Anyway, none of that matters until you get in your (or your friends') driveway!