OLDS Water pump inlet and radiator outlet size

rfpowerdude

G-Body Guru
Jul 15, 2013
674
1,076
93
Palm Bay, Fla
Does anyone know off the top of their head what the stock water pump inlet and radiator outlet sizes are for an Olds 307 application (say, 1987)? Is it 1.75" W/P inlet and 1.5" radiator output?
 

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