402
etc. etc. is a very big range on a 402. What I mean is, what 402 is it? All 396/402's came with forged cranks, into the mid 70's anyway. If it is a 2 bolt block, save your money. They can't be bored past .030" (402), .060" (396) unless they are sonic checked for core shift/wall thickness. And then you still have weak 2 bolt block. If it is a 2 bolt block it has oval port heads. Not a bad little street engine with the right cam and manifold. But not worth spending much machine work/parts on. Now, if it's a 4-bolt block, that's a different story. #1, it could be worth something to a restorer (depending on what it came out of). #2 those blocks also came with nitrided cranks, forged pistons, and big port heads. Those blocks can be bored (if sonic checked) to 4.250" and then you've got something.
Good luck, Dan