wngsprd
Super Member
Biggest engine offered in 67 Mustang was the 390 c.i. / 320 HP.
https://media.ford.com/content/dam/fordmedia/North America/US/2013/11/18/1967_Mustang_Specs.pdf
Thanks for providing that link...brought back memories...I had a 1967 Mustang 289 and dreamed of having the 390 4bbl instead. My friend's dad was a mechanic and owned a garage...he helped his son "build" the engine and drop it in with a new transmission...it was either a 428 or 429, but not a stock engine. I remember he couldn't close the back of the hood so had it raised up as well as those front pins and clips that got to be popular. I think they eventually did everything known back then to that motor to juice up the HP since he raced it down at the Creeds drag strip.