I needed some dash 4 AN flex hose for the drain back out of Tracy's
PSRU all the way back to Mike Wills custom oil pan.

He had used rigid aluminium line which is a bad idea if is is really
long. In that case is tends to vibrate, fatigue and crack.
On our eight quart oil pans we have thick materiel on the
front end to accommodate a pipe fittings. There was not
enough height on Mike's trick pan to accommodated the
necessary materiel and  a pipe fitting for the PSRU drain back.

I used AN dash 4 SS braid instead.

I had to re-educated myself on adding AN reusable fittings to AN hose.
A very tricky thing to do.

These are the best written instructions I have found so far.
Follow these  instructions exactly. No skips and no short cuts.
Use paper masking tape. Duct tape and electrical tape tends
to melt. Paper tape burns and remains stiff very important.

The best thing to use for cutting the hose is a hand held
friction saw.

When tightening the back nut clamp the hose in a vice just behind
the back nut. Apply back pressure to the front nut to keep the SS braid
in the fitting.

Paul Lamar

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