Contact the person you want to get a chip from and see if they burn chips for the injectors you want. Yes, most are interchangeable as long as the plugs match.
Yes,
the injectors are like spark plugs in a sense, they are manufacturer neutral,
I think late model T-Birds injectors have been used for some swaps (can't remember the psi of them!?)
People often refer to them by the color of the stripes (blue stripe, green stripe which can indicate the psi)
but this is "iffy" I don't think there is an official color coding system
Just make sure your chip is burned for the correct psi
HTH
D
Thanks guys, I have to track down the injectors from my brothers mustang and double check. Will most likely go with a vendor on the site, just wanted the information.