340 or 360???

they are both great motors. but in my opinion i think your better with a 360. like already stated they are a lot cheaper to purchase. then you also get an extra 20 cubic inches right off the bat which is great on the street. my lil 64 valiant would go 14.0 with a stock 78 360 with eddy performer intake and 273 exhaust manifolds. with the spitfire headders they make now it would have been in the 13's easy. not super fast but very fun for a street car that you could drive anywhere.