cobra mass air question

I'm selling a Pro-M 80mm mass air calibrated for 42 lb injectors and the cobra computer on ebay. Now I got this question from an ebay user and it has me stumped becuase of how the cobra computer works being calibrated for 19s I think but running 24s. I got a gt which is why I can't use the meter so have no clue about the setup. Can anyone exxplain it to me so I can give him an answer. Here is his question. Thanks

i have a 95 cobra with a vortech sc, i run 36 pound inj. with a pro
m 80 mm. calibrated for #30 inj. running a fmu. do you think going with
your meter and purchasing #42 inj. is a much better setup. and if i'm
correct your meter should be calibrated for #36 inj. if you were
running a stock computer. let me know what you
think...................thanks

Pro-M knows its suppose to be used on a cobra. I got the meter with my turbo kit. so knowing this, should this meter be used on a cobra with 42lb injectors?