Fuel return from rear carb for 70 1600

[Marc&Heidi <mtyler@hctc.net>]

List, please pardon the on-topic posting, but does anyone know the size 
of the flexible line from the rear carb to the fuel return line?  It 
seems to be a larger size than the 1/4" line used upstream of the 
carbs.

-Marc
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Marc Tyler Sisterdale TX
1970 1600 #SPL311-31016
1965 L-320 #L320 013642