What about the ford cams like the B303, the 351 does have the same cam bearings as the 302. That is what I am planning to do. I just put the spider in , punched the holes , drilled and tapped , and everything fits so far. I don't have the lifters yet , but after I change the cam bearings I will be putting the cam in to see how well everything goes together. The only thing I see to be a problem might be different length push rods , but I'm sure new push rods are cheaper than the 400+ dollar lifters. Does anyone know why this wouldn't work?