Tuning with 50#injectors in the NJ area?

I am going to be running a 383 with 12# of boost and was told I would need 50# injectors if I want to get rid of the FMU...The only problem is most of the shops that I called about tuning my OBD1 PCM says they cant do it cuz its too hard....

Has anyone here done it?

Is there any performance shops near or in NJ that can tune for 50# injectors?

Thanks,

TTT...

Any one?

Is what I'm asking realistic? I have seen a few people run 50#ers....Some one has to know (Please)
:D