Can anyone break down these radiator tag letter and number codes:

IA FE
CA
30

Left tank (filler side): CA - letter "C" in between the C and A
Right tank: IA

Thanx!

 

I beleive the FE coded radiator are for 1970 HD cooling applications. Check this thread out - has a chart with radiator codes and tanks in with a bunch of information - though i think we never did answer all the questions definitively

https://classicoldsmobile.com/forums...iator-tag.html