This is from Off-Road Adventures, About the Furd Y Block Engine
Dennis:cool:
The 292 V8 was long in the tooth when it finally left the Ford truck line in 1964. The basic design had a proven reliability record over about 10 years in service. One of the unusual features of this engine was the crossover pipe on front of the engine. It fed the left manifold into the right, which then had to carry the flow of both banks out the pipe. This no doubt limited upper rpm power with lots of exhaust restriction. A HD version was available for larger trucks that cranked out ten more hp than the standard engine.