1968 340 oil capacity

[S'cuder]

Got it 5 quarts. I actually have the short filter but I’m gonna put 5 quarts in.
When shortening the dipstick do you trim the top?

Is it hitting the bottom of the pan when fully inserted?

 

[johnnycuda]

Is it hitting the bottom of the pan when fully inserted?

No

 

[S'cuder]

No

You shouldn't need to cut it then.

Have you measured your tube?

 

[toolmanmike]

You shouldn't need to cut it then.

Have you measured your tube?

Exactly. Something is goofy for sure. Shortened tube, wrong tube, or the wrong dipstick. 5 quarts with a filter, run it and shut it off. Let it set and then recalibrate the dipstick.

 

[AJ/FormS]

Because you have a 340,
in the which it is normal for them to BURN 1 USqt every 900 miles even when brand new; I highly recommend an extra capacity oil pan, in the which you can put at least 2 extra quarts without it getting into the windage tray under your driving style. Like said, the two most important things are;
1) to keep the pick-up covered, and
2) to keep the oil off the crank.
If you got that handled, then, where the oil is on the dipstick is a whole bunch less important.