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I am almost finished replacing my heater core and I want to replace all of my hoses while I am at it. Looking through some of my catalogs it appears that the radiator hoses differ between a car with an aluminum radiator and one with the other style (not sure what that is right now). How can I check the type of radiator my car has? I want to make sure I order the correct hoses.
The only 69's that used an aluminum radiator were the following:
1) 300 hp with manual transmission;
2) some L-46, especially early;
3) L-88/ZL-1
ALL other 1969's used a copper/brass radiator. However, different copper brass radiators (and, different hoses) were used for small blocks and big blocks.
I just checked on this in case my memory had failed on this one (as it has in so many other cases). I can't find any record of there ever having been different part numbers for the radiator hose for any 1969 Corvette application with and without N-40.
The upper hose for most 1969 427's, GM #331876, is a mid 70's replacement for the original hose, GM #3967433.
The lower hose, GM #3947868, is the same part as originally used for all 1969 big blocks, except L-88/ZL-1
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