My 6.1 retrofit thread

Rat Patrol said
the G3 runs a 1.5" top hose and a 1.75" bottom hose.

I'm pretty sure it's 1 3/4 & 1 3/4- that being said, you can get this to run a 1 1/2 & 1 3/4 radiator (LS sizing):

[ame="http://www.amazon.com/Allstar-30240-Radiator-Hose-Reducer/dp/B008REFBBE"]Allstar 30240 Radiator Hose Reducer 1.75 to 1.5 : Amazon.com : Automotive[/ame]

Car is looking great! Keep up the great work!