All SVO blocks are Clea-vors, built for NASCAR & Busche cup racing. Dirt-track sprint cars use these blocks; they have proven reliable at upwards of 750 horses. They are built on the 351-W block plan with a removeable aluminum Windsor-type front nose, but use 351-C crank bearing sizes for lower bearing speeds at very high rpms. Some or most of your Cleveland stuff will fit a 9.2 deck block (there are 9.5 deck blocks, too), with the exception of the water pump, cam and oil pump which are Windsor. Some but not all SVOs had siamesed bores which allows large overbores, and the blocks are generally stronger and heavier than your production 351-C. All SVO-Ford dealers have or can order these, and many Pantera vendors are also SVO dealers.
