Designed to run on 91 octane pump gas ... for all you die hard for lovers, this is the wow factor engine! Ths bad boy 729 cu. in. Sonny Leonard Hemispherical headed street engine produces over 1270 HP on 91 octane unleaded fuel, yes, on 91 octane unleaded fuel! The 729 cu. in. was built for the hard core ford street car enthusiast, that not only wanted the ultimate in performance and reliability, but also the wow factor! With Sonny's hemispherical 729 engine features all the latest technology and is made for everyday street driving, it features all the best components, for driveability, and reliability.

Designed to run on 91 octane pump gas ... for all you die hard for lovers, this is the wow factor engine! Ths bad boy 729 cu. in. Sonny Leonard Hemispherical headed street engine produces over 1270 HP on 91 octane unleaded fuel, yes, on 91 octane unleaded fuel! The 729 cu. in. was built for the hard core ford street car enthusiast, that not only wanted the ultimate in performance and reliability, but also the wow factor! With Sonny's hemispherical 729 engine features all the latest technology and is made for everyday street driving, it features all the best components, for driveability, and reliability.

for more information please visit www.sonnysracingengines.com