Ray: When you install the oil pressure gauge that uses an oil line, I advise that you install a separate gauge under the dash to read [pounds of pressure and retain your existing "idiot light" because the light draws your attention immediately when oil pressure goes down. To retain both, simply install a 1/4" pipe T into your block where the oil pressure sender comes out, then screw the oil sender into the T. Then screw in a 1/4 to 1/8 inch pipe reducer into th remaining T opening. Your new oil gauge should have a 1/8" (or 1/16) connector to the tubing that goes to your gauge. The other and of this connector is 1/8" pipe thread to scew into the T that you installed. I prefer copper tubing instead of nylon, an it should have a circular loop anywhere along its length to absorb vibration. You end upwith both a gauge to minitor prssure and a warning light to alert you immediately in case of oil pressure failure.

Don

Here’s a picture of a braided steel line being used for oil pressure. At the same connection is also an oil temperature sending probe.

Lorena, Texas (South of Waco)

Stainless steel

Braided

I have searched endlessly but what in the world are "brained S/S lines"?

~DJ~ AKA "Bleach"
1956 Ford Fairlane Town Sedan 30K original miles

I'll just add that compression fittings are available for copper tubing so you don't have to do any fancy flaring. And ditto the electric gauges. I'm an old f@rt and just don't trust 'em

Copper tubing is readily available but you can also get brained S/S lines and even Kevlar oil lines these days.
http://www.speedwaymotors.com/Shop/Oiling-System-Engine-Oil-Pressure-Gauge-Tubes/12.html

"The Master Cylinder"

Enjoying life at the beach in SOCAL

You can buy 1/8 inch copper tubing in rolls at a parts store in varying lengths. i would recommend using a mechanical gauge plumbed with copper tubing. I hooked a mechanical up in my dd f150 and left the factory electric gauge hooked up as well and according to the electrical gauge it claimed i had awesome oil pressure but the mechanical varied from 40 psi to 0 before the electric one moved

1962 f250 currently heartless
1961 country squire 292 3 speed
1963 galaxie 390 powered
1976 f250 4wd 390 powered

Don, from my experience, is partly correct. The gauges do come with fittings to 1/8" BSP or gas fittings. The blocks are drilled and fitted with 1/4" BSP plugs. You will need a 1/4" gas tee piece and a 1/4" - 1/8" reducing nipple. Personally I would use an e!ectric gauge as most mecvhanical gauge fitting Kits these days use nylon lines which can fail if they contact or come too close to the exhaust.

Rick - West Australia
Do Y Blocks Downunder run upside down? Gravity Sucks!!

Your gauge should come with an i/8 inch pipe fitting adapter to the tube going to the gauge. The easiest way is to go to the nearest hardware store, get a 1/8 nipple and tee, brass looks best, but anything will work. Take out your current sender and screw it in one part of the tee, the nipple in another, and the gauge fitting in the third. You might want to experiment to see which configuration works the best for you. Tighten everything down and screw the nipple in the hole the sender out of, attach the sender wire and the gauge tube and it should all work.

Good luck,
Don