I am in the process of dropping a 408w into my 88 fox. I understand the dynamics of speed density and that the stock ecu will not work. I ordered a A9L ecu and have it ready to install with a MAF. However, I am going to be running 42lb injectors and have heard negative things about calibrated MAF sensors such as Pro-M. I have never tuned an engine and Microsquirt scares the out of me. I guess my question is, should i gamble and use a Pro-M calibrated MAF to 42lb injectors, or should I suck it up and buy a tuner and just learn the and run without a MAF setup? Those who have experience with both options I would love to hear what you have to say.