mlatorre

I desided to make my LS1 easier to change antifreeze by installing a central drain port by way of steel lines connected to existing antifreeze drain points. Here are some pics to help those who need them. (Update! the hex size on the small plug had to be reduced to 22mm in order to clear the slight counter-bore on the block while using a 12pt socket to install. That involved grinding about a 16th of an inch off of each flat of the hex 15 min. deal.
Mark...

ericray

Welcome, those look nice.