[Gearhead999]

You're talking "C" heads on a Windsor style engine, right??

You also need a unique intake manifold that is made for this conversion. You need to drill some passages also. Don't exactly remember which and where or the details. But, it is out there and available to tell you what/where/how to do it.

Why go with "C" style heads?? Just get a good set of aluminum aftermarket heads and bolt them on. There are many makes and price ranges. With out the difficulty of mix and matching parts. And also the expense of the "special" intake. Unless you want a Boss 302 style engine. Then go at it....as they say, "Get-er Done".