Discussion in 'Small Block Tech' started by 70 Buick Gs, Aug 8, 2019.
X2, Yup, post #5 spells it out.
I think it would probably designate "Horsepower Overated".
Saw that it pointed out the 2 engines, just don't think anyone explicitly debunked the "HO" part. Our cars get confused enough with Olds "rocket" engines, didn't want an erroneous HO crossover too. Haha.