I say if you already have your heart set on it and have most of the parts then build it and see your happy with it. have the block checked before you go .060 over. balance the rotating assy. if you don't have any parts then I would look for a 360. and put the same effort into it as the 318. good luck.My plan is to use KB167 +0.060, 318/340 crank 3.31, ported 974 heads w 2.02, 1.60 and milled to 60cc valves Lunati Woodo 268/276 cam, offenhauser 360 w Holly 600. Am I on track with such set up or off side what do you say?