Would my old computer of the 55mm MAF work on the new 73mm i just got. because the old 55mm reads AFH55-03B AND THE ONE THATS ON THE 73MM SAYS AFH70-02
would there be any problems or how does this work??
Assuming your talking about a C&L MAF, you should use the sensor that is on your car now and make sure the sample tube size is correct for the injectors your running.
The one that is on the 73mm MAF is from a car that had a 70mm unit. The fuel curves are a little different that is all. Re-use the one from your stock as it is designed to work with the 73mm unit.
I am assuming that you have a C&L with the proper sized tube in it for your injectors.