Re: Power From Xf
11:1 is to high for a street car. 9.5 to 10:1 would be better with flat top pistons running premium.
Since you have an auto you cant put a big cam in them unless you have a high stall in which crow recommends is the lowest number of the cams power range.
My car now is 4 speed manual ,small cam, 2.5inch exhaust, pacemaker extractors and rejetted weber. It goes nice for my daily driver with around 140hp or around 80kw@wheels. Im stepping up to a 500 2 barrel holley now aiming for 200hp/150kw.
I recommend manual conversion, lower diff gears, get the hurricanes extractors, 2.25-2.5 exhaust, then get the weber dyno tuned and rejetted. It wont eat V8's until you do major head work and get a nice four barrel carb on aftermarket manifold (cain or redline).