I have a 1973 mustang mach 1 with a 351C 2v. I've done some research and found that the car is rated at about 175hp. The compression is 8.6:1. I am interested in what all I can do to make the car perform better with higher horse power without rebuilding the engine. I am thinking about such modifications as adding a 4v carb and new intake along with long tune headers and new exhaust. By putting a 4v around 600 cfm, what kind of horse power should I expect to gain along with the other modifications I would like to make. Are there any other easy modifications I should make. Give me some advice.

 

cam, intake headers exhaust and carb you will be making more power also look into roller rockers

 

Not really a NOx fan,,, but it is "easy"....