Supplementing my friend Larry's post, the so-called '10-qt' Aviaid pan uses the identical stock dipstick length of 38". Reason is, the depth or distance between the flange and bottom is unchanged in the big pan; only the volume is greater due to a longer sump.
Note there are a few other pans out there cheaply made for drag racing that ARE deeper than stock, and with those you will need a custom length dipstick. Such pans are often merely a big baffle-less oil bucket, which is useless for a hard-cornering Pantera. I wrote an article a decade ago that showed one of these with 8 qts of oil in it when the Pantera it was attached to threw a rod during an open track event, from oil starvation....
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