170 /6, Whats it worth? And where can I get one?

HP and gas mileage isnt normally used in the same sentence. KISS have you looked in any of the JunkYards for either the slanty or a good Small Block? Here is what I did. Set a plan and stick to it as much as you can. Decided what you want and how to get there. IMO I believe that a good running SB in your case would be a better option. Why a 318 though there are 360's out there too unwanted.