Question about injectors on EFI'd 10 valve cars

[Dan Dwyer]

I'm trying to compile very preliminary information about adding EFI to 10v
CIS cars.

I understand from Javad's site, 80tq.com, that you can use 20v injector
inserts in the 10v head to accomodate solenoid type injectors.

My question is, are solenoid injectors physically standardized?  I mean do
they have the same physical dimensions?  I don't have much experience with
solenoid injectors but from all the pictures I have seen, they all look
exactly the same.  I was just wondering if injectors off of a
Ford/Chevy/Audi/Honda/etc.. are all interchangeable as long as the impedence
and flow rate suit your application.

TIA,

Dan