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They are broadly interchangeable.
There were at one point 2 main styles and 2 different resistance values in all kinds of different injection rates.
Could be more out there now.
So you only needed to lean the 3 main parameters of your injectors, the style, resistance and flow rate used on your older vehicle and find a newer generation of that injector with those same specifications and make sure they haven't changed the electrical connector.
As the injector internal design changed and got better the outward foot print and coil resistance stayed the same.
I don't recall the injector style types and improvements they gained over the years, I used to keep track of that stuff but I have shifted back to carburetors.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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