[427sharpe]

Heads will interchange between 351w/302 and 351C with very little machine work, basically just altering water routing---the Cleveland has a dry manifold and the Windsor a wet one. A popular conversion for a few years has been to use a set of 351M/400 heads on a 302/351W. Even the 'small' 351M heads' ports are MUCH bigger than any 302/351W setup, but not as big as the 351C 4v/Boss302 set. The 351C 4v and the Boss 302 heads are almost identical---only water routing is changed by drilling out the Cleveland water port on the head to block surface and installing a freeze plug (make sure it sets BELOW the head mount surface) and drilling a new hole in the head-to-manifold surface so water can flow into the intake. Use a Boss 302 manifold (will have port mismatch without port plates) or use the manifold specifically set up for this swap--I think Roush still sells it pretty reasonably. In reality, this is a lot of work considering how much progress has been made in Windsor heads like the twisted Wedge, etc...You could reverse the process and put a good set of W heads on the C by using the port plates and reversing the water flow proceedure described above....