I'm using a Mopar MC since they are aluminum & plastic and make for a really clean & cheap install. They have 3/8" fittings and come in a wide range of bore sizes. You need to open up the mounting holes slightly but otherwise they bolt right onto the firewall.
Here are the part numbers I've gathered:
https://snag.gy/oDkjZ5.jpg
I am using a cheap ebay prop. valve inline with the rear circuit.