Not Ranked
The 351 HO was the name give to the production engine that replaced the Boss 351 in 1972. It was Cleveland style head on Cleveland (non Windsor) block. I believe it was a hydraulic cam motor instead of more powerfull solid lifter Boss 351 from the prior year. This signaled the downturn of performance in Ford showrooms after the heyday of the Boss 302 & Boss 429 of 1969 & 1970, and a 1 Year run of Boss 351 in 1971. As I recall we only had the 351 HO available in the (new larger) Mustang and perhaps the Cougar Eliminator (??). Couldn't give them away.
Ford performace was dead at this point.
Rick
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