Heart of the MatterThe Boss 302 block (M-6010-BOSS302) in the '07 Galpin Boss Mustang showcases the features of Ford Racing's latest production blocks, such as a 4.125-inch bore and 3.500-inch stroke capacity inside a standard 8.200-inch deck height. Other highlights are splayed four-bolt mains on the 2, 3, and 4 main caps, revised oiling and cooling-system passageways, and Siamese bores with drilled coolant crossover tubes. There's also increased bulkhead material, threaded core plugs similar to the original '69-'70 Boss 302 blocks, as well as threads for 11/42-inch head bolts. Made from 41,000-psi, high-tensile iron with a high tin content, these blocks are cast in the same foundry where Ford's PowerStroke diesel truck blocks are produced. All in all, the block is a bulletproof foundation for engines up to 374 ci and forced-induction or nitrous outputs in excess of 1,000 hp.
As for complete crate engines, preliminary part numbers in the 2007 Ford Racing catalog indicate there will be engines with 302 and 347 ci displacements; there's also word on a possible 331ci variant. The dual-quad-equipped prototype example shown here was on display at the '06 SEMA Show. Using the combination of a high-revving 3.125-inch short stroke and deep-breathing Z304 ported cylinder heads purported to flow 350 cfm on the intake, the 331 version made 500 hp at 7,200 rpm. Expect a crate engine based on the new Boss 302 block later this spring.