1964 plymouth valiant recommended rim for 245s in the back

Whatsup guys. Today is a good day. Rear end is installed and brakes also.

I have my measurements. They are as follows: from front of the face of the disc brakes here are the numbers

5 1/4 to lip

6 3/8 to leaf spring

3 1/2 top of inside wheel well

I want to run 245s on the back. What size rim would work the best for me ?

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Looks good. Ya, that rear disc will throw you off because it's not the same as my 66 with 10" drum brakes. For my Swinger, I started with a wheel that fit even though it was too narrow. I knew I couldn't add a inch of backspace but I wanted to go from a 5.5-7" if possible. I had room for 1/2" on the inside and a bit more than a inch on the outside. 15x7 with 4.25" backspace.