I installed a deep pan with a pick up extension that puts the filter back near the floor of the pan on the 68 Barracuda

I did not adjust the OE transmission dip stick or tube,, as I am thinking that the original marks would still be the ones to use.
I am just putting more fluid above the filter-pick up,, so Hot full is still Hot Full and Add is still Add,,,,

is that correct?

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Doo Ron Ron and the Duke of Earl are friends of mine.....
https://www.youtube.com/watch?v=uX8Nj8ABEI8

In my ignorance, I would agree.

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Dave

1977 d-200 crew cab ex-army pickup wants it's /6 back
1962 Valiant 2 door, 170, three on the tree
1972 d-100 parts truck
80 volare wagon now a parts car

Yes, that is correct.

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Official Cookie and Mater Tormentor.

Is the extension needed? Maybe for drag racing, to keep the pickup submerged during a run?
I have a deep pan on the shelf. I thought about putting it in, but it would be about the lowest thing on the car.

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"When you find a big kettle of crazy, it's best not to stir it." - Pointy-haired Boss

1964 Valiant V200, 225/Pushbutton 904
BBD, CAI, HEI, LBP, AC, AM/FM/USB, EIEIO

On the advice of my trans guy I ran a deep pan on my red car with no extension for a full season. He wanted to see what difference it really made. He tore the trans down after the season to look around. Nothing was worn out or damaged.

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Official Cookie and Mater Tormentor.

If you fill up to the "full" dipstick level, and there is not too much slosh (cornering, braking, accel forces), then it should not matter at all. I always am sloshing my car around, so I would run the lowered pickup.

Lou

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Home of Slant6-powered fun machines

The idea behind an increased capacity pan is primarily to help ensure you don't uncover the pickup and suck air.

If you don't use the extension, the extra fluid becomes most useless. It, or other fluid just like it, just sits on the bottom of the pan doing very little for you.

Correct. You do get a more fluid mass to aid in cooling, but I agree if you are not using the extended pickup then the usefulness of the deep pan is greatly reduced.

Lou

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Home of Slant6-powered fun machines

When I run a deep pan, I use the extension, and run the fluid about a 1/2 to 1 Qt low, to keep the fluid away from the rotating parts.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 225 nitrous
64 Valiant Signet
64 Valiant 4dr 170