NOS 3.51" mopar stroker crank in a 318?

I have a similar or same crank (It's been a while since I looked at it) ready to go into a 360 block. (It has the larger 360 mains) It is designed to destroke a .030-360 down to meet the rules. I have it all. It makes the engine into a 352. Think of it like a 340 with more stroke or a .030-360 with less stroke.

There's worse things in the world. It will still move an A body really well. I just wouldn't want to order custom slugs. MP used to have all of this on a shelf waiting.

Personally, if I was in the position of having a 318 & this crank, I think I'd opt. for a 340 block.
4.04 X 3.51 = 359.96
4.07 X 3.51 = 365.32

The (possible) 8 bolt flange is not a big deal. You just have to take an extra 2 minutes to look a little deeper to find what you need and it is not terribly expensive.