I am going through the top end of my L98 and one of the items on my to do list is the coolant bypass at the throttle body. I had a few molded heater hoses lying around from other projects and found one that fits quite well. It is a Dayco 86121. I'll attach a couple pictures to show you how I'm going to use it. In lieu of using a hose barb or anything else to couple the existing two hoses, this should do the trick nicely. Just have to trim down the long end to fit your specific application.

Just thought I'd pass this info along.