Re: Chevy 350
The 010 block was used for 10 years or so. It could be a 2 or 4 bolt, the only way to know is to pull the oil pan and look. Look on the pad on the block under where the alternator would be. There are codes stamped on that deck. If you can find that along with the date cast into the side of the block (it'll look something like this: L 10 78), we can tell you exactly what you have. Best of luck!
Experience...... It's what you get when you didn't get what you wanted.