i have a 1972 convertible i am restoring and what size fuel lines and brake lines should i but. i am running a 454 block

just order the stock brake line kit. as for fuel line, just get the 3/8 fuel line, unless your plannin on racing it. jim

The fuel lines for a big block were 3/8" and that will be plenty adequate for a stock engine. If you plan on future modifications and visits to the track you may want to go to 1/2" or even 5/8" diameter. Brake lines are 3/16" in diameter.

Tom

The fuel lines for a big block were 3/8" and that will be plenty adequate for a stock engine. If you plan on future modifications and visits to the track you may want to go to 1/2" or even 5/8" diameter.
How big is the fuel passage in the needle 'n' seat? How many needles 'n' seats do you have? 5/8 fuel plumbing?

I'd think you better have 650--700 horsepower before you even begin to think about 1/2" fuel plumbing. This assumes a rear-mounted electric fuel pump pushing fuel at higher pressure, with a regulator near the carb(s) or injectors.

Brake lines are 3/16" in diameter.
Yeah, most of 'em. The single tube from the front to the rear brake hose at the rear axle is often 1/4" because it's carrying enough fluid to feed two wheel cylinders. Easy enough to measure.

How big is the fuel passage in the needle 'n' seat? How many needles 'n' seats do you have? 5/8 fuel plumbing?

I'd think you better have 650--700 horsepower before you even begin to think about 1/2" fuel plumbing. This assumes a rear-mounted electric fuel pump pushing fuel at higher pressure, with a regulator near the carb(s) or injectors.


Yup.