I have a Mach1 maf on my car with 60's. I bought a conversion to make it a 4 pin and also moved my IAT to the maf with two other wires, for a total of 6 wires. I was told the sct maf's are too big for my blow through application, and the Mach1 was perfect fit.
I had to fab up a piece to make it a blow through for the pipe that went to the intake. Nothing hard, it was a piece from an old cold air off a 02'mustang all I did was cut off the 90deg elbow so that it was straight.