First, we need to know which 351 we're talking about. There's 3 different ones to choose from. The Windsor looks just like a 302, only wider across the intake manifold from the taller deck height. The Cleveland has larger valve covers with 8 bolts (6 bolts on the windsor) and a water neck that sticks straight up from the front of the block, as opposed to coming out of the front of the intake like the 351W/302. Here's the confusing part. The 351M looks just like the 351C, only again with a taller deck height and wider intake manifold. If you can post pictures, and measure the width of the intake, that would help us help you with the identification.


351W


351C