[Paul D]

Nathan, What I've heard about the '67 cars not having an L72 is that the Corvette powers prevailed and politically got it killed for the '67 model year. Apparently they thought an engine in the big car that was comparable to the Corvette would dilute the performance image of the Corvette.

Also, it's interesting to note that the Z24 option on the '67 big cars has the unique three chrome "stacks" on the top of the hood indicating that at least at one time Chevrolet was planning for a Tri Power engine in '67 big cars similar to the Corvette L71 427 435 horse L71.

My guess is that politics won out in 1967, but in '68 and '69 the L72 again became a RPO for big cars. Maybe the Corvette guys felt that with the Tri Power options and the L88 they were adequately maintaining there image as Chevrolets performance leader. Of course, then you have to ask yourself what happened in 1970 with the Chevelle LS6 450 hp option??

My two cents.... for what it's worth.....
Paul