[JJorgensen52]

Originally Posted by leftybass209

I've never heard of that and if you look at any fuel system Chevrolet designed with a mechanical pump in the muscle car era, the fuel filter is sitting a few inches before the carb. As far as using a 3/8 filter on a 5/16 line, all you are doing is alleviating restriction for the length of the filter and line, then adding it right back when the line returns to 5/16 so it negates what you are trying to achieve.

Originally Posted by 68Gold/white

There is probably a siphon effect on your line, so the filter shouldn't be a problem. What brand filter??? I DO NOT like the clear plastic filters, seen them fail, I only use metal ones. Seen one clear plastic unit cause an engine fire...

3/8 filter is fine, they generally have an arrow on them indicating flow direction...

I am presently using a clear plastic filter, because I wanted to see what junk I'm trapping coming out of the tank. As to the size restrictions - I just figured if I went up a size from the line, I would (hopefully) minimize additional restriction vice a straight section of 5/16" hose/

I think this might be where I got the "no pressure side" thought from, because I've heard of the cheapo filters failing and spraying fuel under the hood.

Come to think of it, my Buick has a metal filter between the pump and the carb. D'oh!