Have a question about how many fuel filters are needed on my 85 Regal, P32, 454. There is one main gas tank in the rear with one supply(3/8"ID) and one return(5/16" or 1/4"ID) and an auxiliary mid ships tank with the same set up. The fuel selector valve is a 6-port valve, supply and return to the two tanks, and supply and return to the fuel pump. Fuel pump is engine mounted with one supply and one return line going to and from it. No in tank fuel pumps of any kind. There is one fuel filter on the supply line going from the fuel selector valve to the fuel pump. But there are also fuel filters on both the supply and return lines between the rear tank and the fuel selector valve. It seems to me that these latter two are unnecessary. Particularly a filter on the return line. But since I'm not an expert, I could (probably am) be wrong. I've replaced the filter between the fuel selector valve and the fuel pump but have not replaced the other two. They are metal and seem a little bit smaller than the one I replaced. Also, it's not obvious which direction they are pointed in, but I assume it would be in the direction of the flow. Would appreciate some guidance.
Thanks
Jim

I had the great pleasure of talking to Jake Jacobson the other day. For those that don't know, Jake was part of the GM/Chevy design team on the P series chassis. What a wealth of knowledge and information!! He's retired(sort of) and still has three motor homes, two of which are Barths. We'll forgive him for the other. Jake gave me a thorough run down on filters for normally aspirated 454's. It boils down to this. Return lines don't need filters. They are there for the vapor lock problem. Supply lines do need filters, but no more than one per gas tank and if you have two tanks, both filters should be before the fuel selector valve. There is also a small filter in the q-jet that commonly gets clogged. I knew about this one having replaced it once. Usually, there's a sock on the pickup for the tanks. They normally don't get dirty because the fuel is sloshing around a lot. Plus, it's a pain to drop the tank to replace the sock. That's it. Simple. If you have an in tank fuel pump, that's a different conversation. I've read posts where folks replaced bunches of filters, most of which were not needed in the first place. Now,I've got to figure out where to relocated my fuel selector valve to give me enough room to install a filter between my midships tank and the valve
Jake spends his winters in Florida and said something about getting up with Danny Z. I'm going to meet him in Cleveland, Tennessee on his way to Venice in October. I know he'd like to hear from any and all.
Jim

thank you for the info as i am in the process of re-doing my entire fuel system.