Noticed your location. If you store your car over the winter, do anything you can to make sure it's filled with pure gas and some Stabil.
I always try and go with pure gas. I've had peple tell me their Spiders ran rough on an ethanol blend, but I think if you do partial fills to keep it fresh, you should be okay. Keep a close eye on the fuel filters and on any car that's getting as old as ours are, always keep a close eye on the fuel lines.
I agree with the comments above, based on my personal experience. Nothing wrong with 87 grade ethanol blend, but mileage will probably be about 10% lower than pure gas, which is usually hard to find.
For a Northeast USA location, during driving months I suggest partial fills to keep gas as fresh as possible. If long intervals between drives/fillups, suggest adding Stabil even during driving months.
If you store car over the winter months, suggest prior to storage filling up tank to decrease liklihood of water absorption, also add Stabil, plus I add a little oil to that last fillup and run thru engine, amounts needed are on other threads, don't recall off hand.