Some of the V-8 trucks had a horseshoe-shaped front mount that bolted into the center of the crossmember and used the same mounting holes as the pre-58 passenger cars on both sides of the harmonic balancer. The frame modification was probably for exhaust manifold clearance on the V-8 engine.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!