340 vs. 360
I know this is a different point of view and not really what you asked, but the 340 is... well its a 340. :-) Its the Chrysler small block, that when put in a small A body, would give almost any muscle car of the era a run for their money and would take most of them.
I fell in love with that engine back then and just couldn't quite run any thing else. Yes, a 360 will produce more horses for less money, esp. with the 340 parts, but just wouldn't be the same.
Brian