subject: car stalls on hot restarts

I have a '94 GT with a DSS 331 motor with twisted wedge heads and trickflow intake. i have light blue fuel injectors which, according to steeda, should be 24lbs. my mass air sensor is still the stock ford part according to its part number. i just recently replaced the fuel pump with a 255lph unit (future blower upgrade) because i thought maybe it was a faulty pump. but the pump works and it still stalls. what happens is when i drive the car it drives great, but sometimes when i come to a stop it will stall out, but more often when i shut her off and go to restart it while its hot, it'll just crank and crank and crank. is it possible that the factory mass air which is supposed to work with 19lb injectors and screwing with my motors 24lb injectors and causing this problem? if not, what else should i be looking at?

So I can keep my existing MAF and make it work with the new injectors? Do I need to take it to a dyno shop where they can reprogram the computer, or is this something I can do myself? And one more thing, is it worth recalibrating the factory MAF or should I upgrade to an aftermarket unit?