318 wasn't "made" to turn rpms because it didn't get the "good parts" like a 340. I've seen 318's turn 7200 rpms for years with stock bottom end. 340's havent' been made for over 50 years, folks are working with what they have or what they can get. It's ridiculous that we can't get past that 340's are no longer in the junkyards for 75 bucks and 318's swap cams and heads and pistons just like ANY other engine being built, including the 340's. Yes, I'd rather have the 340, but no, I'm not paying the "340" tax.