My 70 big block was a side terminal from the factory. I've always used DELCO batteries. Bought my current one in 1999. I don't use the car much, 200 miles a year or so but it stays on a battery tender most of the time. I had always heard that the side post created less corrosion than top post. Don't know if it's true or not. By the way, OhMonte (Joe) where in DELCO are you? There are a couple of us in Chester Ccounty, me, and 7tonemonte (Tony).