Firebird 400 Radiator Outlet Size for 1968

Q: Firebird 400 Radiator Outlet Size for 1968

I’m trying to figure out if the radiator in my 1968 Firebird 400 is original or not.

A: For starters, does your radiator have “HARRISON” embossed on the tanks ?

How about the Production Usage Code Tag ? 400 Codes…. UQ, UP

My original (UQ…RAI, 4spd) is in storage however, the “UP” tank I have is…
Upper: 1.5625″ Lower: 1.875″

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Category: Engine - Cooling System
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