'65 Mustang Hi-po vs '65 Formula S

65 Cuda 340 said
I agree. But the hi-po 289 had a much hotter cam than the 273 Commando. Better comparison would be vs. the 289 four barrel. 225 hp rating vs. 235. Stock to stock, 273 was an easy winner. Just based on my own experience.

64-67 HiPo 289 was rated at 271 HP (they made 489 '67 K-codes too). It only had a 90 day or 4K mile warranty on it.

Commando 273 is rated at 235 HP.