2/16/2020 Update: Received complimentary fitting from Daytona Carburetors. I was told by Ron, one of the technicians that these fittings are exclusive to them. It is a 3/8ths to metric. The Metric side goes into the Carburetor. It doesn't bottom out, its the flared kind, so just snugged down. Now the setup looks much better with the glass bowl filter. Now just enjoy driving it. Will soon update with city MPG's.