I picked up a carb on ebay for 218 Plymouth flathead. The one on the car is a carter 1b. The one I got is a different model. I think its for an automatic tran car. My car is a stick. Are they interchangeable? Also are there any shortcuts to cleaning out the fuel system. Car has been sitting a couple of years and gas is bad.
They should be interchangable. Easiest way to clean your fuel system is to siphon as much bad gas out as you can, fill it up with some fresh gas and some Toluene(the most common ingredient is off the shelf fuel system cleaners). a quart for every 10 gallons is a nice ratio for quick cleaning. Drive that tank down to about 1/4 tank and fill it up again, and you should be good to go. You could, of course, drop the tank, drain it, clean it, tear into the carb and fuel pump to remove any varnish, etc, but thats aot of work when a few tanks of fresh gas and some cleaner will do teh same thing.
If you bought yourself a new carb to remedy the fuel condition. I'd advise you to drop the tank. Have it cleaned and install a fuel filter between the tank and fuel pump. Not that expensive and you will never second guess the issue again.
There are all kinds of variations, even in carbs that look the same. Impossible to tell what you have without make, model, and number. The wrong carb may or may not work, but probably won't work as well as the correct carb.
Do yourself a favor. Drop your tank and clean it out, just be careful when you drop the fuel line from the tank that you don't lose the ferrule in the tank inlet. There is a Oilite stone filter in the tank that will clog over and over again if you do not get the tank clean. When I did mine in my 48 Plymouth, I got about two cups of **** out of the tank, gravel, gl***, a fork, chunks of rubber a straw etc. I put a 6 foot long piece of chain in the tank and shook it in every direction for quite a while then rinsed it out with a hose. Then repeated the process several more times. The chain bouncing around inside the tank will knock the rust loose. I put a cheap inline filter just before the fuel pump to catch all the crud. I had to change it about once a week for the first month or so then every couple of weeks then once a month or so now it has been quite a while since I had to change it.