I have a 90 notch that, for some reason, now has a speed density setup in it. In looking for a problem the other day I noticed that the plug is still in the car for the mass air meter. The computer is definately a speed density unit and until recently(whole different topic) the car ran fine. My question is, If I buy an A9L, a MAF, and the correct MAP sensor is this all I need to do to convert, since the wiring is already in place. Will this be a simple plug and play procedure(theoretically speaking)? The motor is bone stock. I'm planning on a 393stroker sometime soon, but for now Id just like to throw in a cam and an old paxton kit my buddy has laying around, just to have something peppy to play with this summer.