[dewulfmd]

The Cleavor was originally a combination of the 351 Cleavland heads with a 351 Windsor block (yes they would bolt on). A special intake manifold was required to mate the two. By the way, this was how Ford developed the Boss 302. I forget the name of the company that made the special Cleavor intakes (I believe there was just one company).

I always wanted to try the combination, but never had the money to experiment with. It combines the great flowing Cleavland heads with the superior oiling system of the Windsor. The perfect setup.

I never heard of a special block, however, the Cleavland heads needed to be modified (coolant holes drilled and plugged).

Does anyone have more info?