Another opinion question

Duster, I'm not telling you "what I'd do". It's not my car, or my situation. Your choice need to be about you and your budget. A smaller budget doesnt mean a cheap engine. It means you "scale back" a little. But, if the budget isnt a real issue, then you should know what does what. A good engine results from quality machining, and quality parts. Period. Whether a Nissan, Studebaker, or Dodge. Size doesnt matter (here anyway...lol), your choices do. If it's a street car, and you have the financial power, then the bigger the better. If it's a budget deal, a 360 will be less than a 340. A 318 you already own will be decent too, when prepared with the same care and attention. I know of several 318s that run very strong, and carry the 340 pie tins..lol.