What is the best way to remove the back seat on a 1953 ford customline

Not completely sure , but there are chassis numbers stamped on either the right hand side front chassis rail ( or left hand ) on some models of Fords. You will have to scrape off the dirt and any underseal. Has the plate been removed from the firewall ?

http://www.automobile-catalog.com/make/ford_usa/full-size_ford_3gen/full-size_ford_3gen_customline_4-door_sedan/1952.html

remove the chrome trim from around the front of the light
behind it you will see probably 4 screws in a frame that supports the head light
remove those screws and the assembly will fall out in your hand
all the head light adjustment screws will be in that frame

both manual&auto were on the back g/gearbox housing where the rear xtension fits,fairlane??? customline

there are usually 2 little buttons, 1 on each side, underneath the seat in the front. push and pull up

you need to remove the seat to remove the deck... pull up on the lower half of the seat, once that is outta the way there are 2 bolts holding the backrest of the seat on. remove them and pull up

some of these , you would have to get in the back seat area. and push in on the bottom front side of the seat to allow the bracket that clips into another bracket to release, do this on both sides of the seat, and seat should release and come out, the top portion of a lot of these older models, you would have to grasp the top of the seat, and push in and up and pull out, on them to release them from the brackets, installation is reverse. hope that this information has helped you.

usually this is air trapped in the system. Try leaving the cap loose on cold start and run engine until upper hose gets hot (ie thermostat opens). That should burp air. Then keep system full as it cools down. so it uscks coolant back in as it cools. Then, tighten cap.