I've had issue with aluminum radaitors cooling good for the first year and then run hotter the next year with no changes
I had to have that radaitor back flush every year to keep the motor running under 200 F
Electrolysis???
I too am considering a new radiator (as a preventative measure) and have some of the same concerns as the OP (nearly identical vehicle as well).
Is there any special maintenance that must be done with an Aluminum vs. Copper/Brass radiator?
FABO member challengergary suggested Champion Radiator (CC526) is a bolt in for $235 to my door.
Any opinions?