When I dynod my max wedge motor, which is no where near your size displacement wise, nor are my cylinder heads of your caliber (mine are stock 518 m.w.) I noticed that cylinder(2 and 7) sparkplug looked funny. Now they werent lean looking, nor were they overly rich looking, hard to describe. Once I got my jetting closer to factory m.w. settings, my bfcs dropped from being way rich to being acceptable, plugs 2 and 7 started looking a little more normal. So I would suggest starting a step or 2 above factory 3705 staggered jetting, run the orange coloured step up springs and go from there. Make sure you have enough jets for adjusting. Of course Im a day late and dollar short, after i get my motor dynod etc, I was in Ft Lauderdale and stopped by Wilson intakes to chat and they told me they can cut the intake apart, clean up the insides and weld it back together and pick up 60 plus horsepower and it looks stock. They told me theyve done a couple for the F.A.S.T. guys. The catch is they need the cylinder heads so they can bolt everything together to line things up, of course it isnt cheap something north of 3 grand. Is it as good as a new manifold....no, do you leave power on the table, yes. What kind of exhaust are you running, factory manis or headers?
