83 blazer problems

[willis0107]

So the blazer had sit in the garage for some time without being started so today I decided to move it. It is a 6.2L I put in two fresh batteries and it started right up I drove it around for about 30 minutes and shut it off. When I went to start it back up it would not start. Both batteries were fresh when I started it up. When I rechecked to see what was going on you could not touch the battery cables for fear of burning your self. Is this a regulator problem or a real bad electrical issue?