I have been researching what performance upgrades I should purchase for my Mustang, but don't know which route to take. I have a 4 bbl 289 in the car currently, and I was researching the Edelbrock Performance Packages, and for roughly $1,900 I can increase my engines HP up to 367 with 340 ft/lbs of torque. The other route I am considering taking is purchasing a 351 (Cleveland not Windsor) and swapping it in. Problem is - parts are expensive and I'm starting over with an engine that I do not know the history of. A mildly built 351 will put out roughly the same hp and torque numbers, but probably weigh more. Which makes more sense? Would it be better to invest more and go with a 351C or will a Performance Package from Edelbrock make my 289 powerful enough for a fun daily driver with some low end speed, not built for a racer.