If you want to fit a 5/16in OD hard fuel line into a 1/4NPT fuel block, this is the fitting you need - perfect for the Stromberg 9146-BIG 3x2 line for Small Block Chevy.
Part No. 9180K
5/16 inch OD hard fuel line can be used on your 97 or BIG97, BUT you need the right Ford nut compression fitting ( 9581K-BIG ) and the 9564K-BIG Stromberg S-jet inlet valve. BIG97s already have the BIG S-jet. Read on!