In a message dated 1/10/13 12 14 18, shawkins777 at comcast.net writes: > Put the 351W in and keep the 351C as a back-up. You'll have to change the > motor mounts though. > >>>351W and 351C use exactly the same motor mounts. Different headers, water plumbing, and a bunch of other small stuff, but the same motor mounts.... Mike