Tiny bubbles

I had starting difficulties after running the car for about an hour and trying to restart after 15 minutes. Keeping the idle up for about a minute,since it wanted to stall,and the engine would run normal again. I would always check the fuel filter after parking and never noticed any bubbles as stated in many posts as the possible problem. After 3 months I finally caught it just right while in the parking lot of "J bugs" , boiling fuel in the filter. Prior to this I had replaced the fuel cut off since it was loose, rebuilt the carb and changed and readjusted the auto choke hoping that was the problem and the problem reappeared soon after.So now I will definitely reroute the fuel lines. I have a 1600, single carb any pics or suggestions on the best routing for the fuel lines? Thanks!

If I had to guess, I'd say: vapor lock. Is your fuel line routed near any hot surfaces? If so, you might want to move it to someplace cooler.

If you go up right off where the frame horns fork, straight as you can, and then back through the firewall, you'll remove any heat transfer from the transaxle case and any bottom side engine heat from the equation.
I'd route the line so that the filter is visible again, or go with an in-line filter and insulated line. Just make sure that the filter is accessable with two hands as you install it. It'll make removal for inspection or changeout much easier.
I'd also say to allow two inches or so of flex in the line to make that maintenance more of a breeze -- Zip-Ties will allow you to keep it away from moving parts.
While the line is off, put a Phillips screwdriver of appropriate diameter in the tank end where it wants to connect to the metal hard line, cutting off fuel to the rear of the car, and then blow the hard line out with an appropriate solvent and a compressed-air blower. Zip-Tie a handkerchief to the rear outlet so there's a parachute of sorts for visual reference as to what was in the tube gunking up the filter.
Repeat as necessary until there's no residue coming out the back end.
Good luck!

If rerouting the fuel line doesn't cure the problem, might want to consider an electric pump mounted up by the tank. Electric pumps are pushers with respect to moving fuel and will shove gas, and the vapor from boiling, down the line getting the vapor outta the way. The stock pump is a puller sucking gas from the tank and if there is vapor in the line...well it sort of looses prime don't pump so very well. Just fuel so thought or something like that.