I dont think they last as long as the brass. I put a new aluminum in my 64 Pontiac and it leaked in a year or so. I took it to the local radiator shop and he said it was junk and to get the brass unit that came with the car..
My alu heater core is 10 years, was smaller and not a good fit. Didnt thought it would last as long as it have. Heartbeatcity has oem brass replacements.
Whichever brass one you buy, take the extra time to go to a rad shop and have it tested and oversoldered to pre-empt future leaks. Well worth it in today's rush to build and sell world.
Yep, call to make sure you're getting a brass unit, which I gave up on and used an old core but tested first. I like the idea of flooding the solder by a rad shop.
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