When talking to robert lewis (owner of a CP 65 mustang) the weight penality for Fuel Injection is becoming decidedly less in the coming years. Down to an almost un-noticeable amount within 2 years. So if your going build something. He suggested go fuel injection. According to him More reliable, more stable, more useable power. But Don't get a 86- block. They are weak and give up the ghost around 500 crank HP. A cracked Block will ruin your day... also stay away from the Alternators 86-88. Apparently there are several bulletines out about them catching fire when the car is parked and buring down houses. I got a first hand experience with this last week when I walked outside to find my car on fire after being parked for 2+ hours. Ford apparently put out the notice but offers nothing in compensation and if you don't have collision, you don't have fire insurance.