OK folks I am officially shopping for cam kits for my 67 Ranchero with 289. It already have a weiand 4bbl intake and bran new quickfuel 450 cfm, as well as longtube headers and 3.25 in the rear. I guess my big question here is: really how much better is a retro-roller cam setup verses the traditional flat tappet kits. The price difference is pretty substantial from what i am finding. Part of me just wants to stay flat tappet and use additional funds for other things, maybe a 5-speed soon, still need stereo, etc. This car is my daily driver here in Colorado. I dont commute very far for work each day at all but i do hit the highways and mountain roads when i can. If the roller set ups are really all that then I'll spring for it. Thoughts?