LSX 1970 Chevelle Conversion
The lower hose I used 17" flex hose(you could get away with 18")
My radiator is Summit's 80457 for a big block Chevy....I used this when I had my BBC......
The water pump for the upper hose was around(these are ballpark) 1 1/4(pump) and 1 1/2(radiator)
For the flex hose I got it 1 1/2 on each end(pump/radiator)
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