Summit also added a big-block Chevrolet version of the SPC block, in the MK IV configuration. These blocks are offered in 4.500 and 4.600-inch bore sizes with either two- or one-piece rear main seals.

The Chevy 454 short-block option, priced at $5,481.69, provides the same four-bolt main cast-iron engine block and rotating assembly as the $8,971.76 454HO complete crate engine option.

Buy a set of new aftermarket "Dart II" iron high-performance small-block Chevy cylinder heads, that's what. These high-tech but affordable new castings (only $495 per pair fully machined, or $750 ...