Small Block Water Pump Bypass Hose 360 LA?

It all depends on your water pump and your intake manifold bypass size. The cast iron water pump 69 and earlier use the smaller hose. You just have to juggle hose nipple sizes so you have the same on the WP and the intake

They both are the same 3/4" behind the lips, I tried a 3/4"ID and it was pretty loose. Thanks for reply..