While waiting for the machine shop to even look at my 65 225, I found a 73 engine with 50k original miles for $300. I've got the engine on the stand and looks to be legit. Everything inside looks clean. I already had my 65 cam reground by Oregon Cams to a 2106. Plan to shave the head and bolt on the 2 barrel intake on the new engine but wondering if it's worth swapping cams for the new regrind. I remember reading somewhere that the cam lift increased a bit in 71 so not sure it would be a noticeable change.