'65 Mustang Hi-po vs '65 Formula S

289 is one of my favorite Ford engines. Even in 2bbl form, they were runners. Especially if they had a stick shift behind them. Might be the fastest 2bbl "cubic inch per cubic inch" motor I've seen/driven?? No 283 2bbl or 273 2bbl would even be in the ball park. I've owned them all.