My motor has almost 130k miles on the stock 351w and I'm looking to freshen it up a bit. I installed a pair of AFR 185 aluminum heads and a CompCams Xtreme Energy Cam (35-255-5) that would be carried over after the bottom end has been rebuilt. The fuel system is the factory speed density set up and the only thing i've added is an adjustable fuel pressure reguator and the intake is the stock Lightning one which is supposed to flow a bit more than the regular 351 EFI intake. So my question is, does anyone have experience or recommendations on a reasonably priced 408 stroker kit? Does anyone have experience with retaining the factory fuel system? Can I get decent power with it? Any recommended additions to aid in tuning? What is the highest compression ratio recommended if I still want to run 91 octane? What is a reasonable hp/tq expectation with what I'm trying to do?