Boy, does my son's slant run crappy!

Hey Jerry, I am with Joe Gilmore. If you get the gas level in the tank less than 1/4 you can take off the pickup without spilling any gas. Check the sock, the pickup itself and get an eyeful of the inside of the tank with a flashlight (rubber coated one). If you got that peppery crap in the tank it will do strange things to your car. It starts to clog up the sock and the pump then the filter. Try to think outside the box here. If the car is running good on the start and after awhile it starts to run crappy its a fuel delivery issue. A great way to figure this out without taking anything apart is to start and just idle the car. Most likely it will have no symptoms while at idle. Let the car cool down even waiting an extra day if needed and do the same thing again only this time mash that gas alot on and off. If its a fuel delivery issue the car will sputter, bog, and die out after awhile. Starting the car right away will be hard and you most likely will have to pump the heck out of the gas pedal to get gas back to the carb (kind of like you ran out of gas). After the car starts it will seem fine until the next cycle like the first. Sounds kind of goofy but it will save you stalling out or bogging down in traffic. I think you will find problems in the carb but if there is any reddish brown crud in the bowl its from a rusty tank and it is screwing with all the stuff on the way to the carb. Might even be clogging up in the line like mine was. I replaced the tank, pickup, pump, line, and carb so I have no more issues. When I pulled the stuff the line had some restriction and the carb was crudded up some but it was the pump that was really bad. Look for that reddish brown crap in the filter. If its there you know what you gotta do bud. Good luck!!
Chas.