Wow, that is rusted. if it were mine I'd pull the pistons,have a machine shop check the block to see if it's worth keeping or at the very least, clean it really well yourself and see if you can do a preliminary honing in the hopes that it might clean up.Anything you remove, tag and bag.
What size brush hone do I need?
Can someone tell what size bolt I need for the harmonic balancer? Since I found the old balancer, I'll put that on and use the bolt to turn the engine.
