273 to Slant Six Conversion?

stop the beast said
quick question - when you're talking about the fuel line at 3/8 is that id or od?

ID. Stock standard is 5/16" (ID). There were no factory 3/8" (ID) fuel lines, but you can buy fuel gauge senders set up for 3/8" (ID) fuel lines, which -- yes, you're correct -- are completely unneeded on most vehicles.