what is the length of a 340-360 car oil dispstick tube?
340-360 car dipstick length?
oil capacity of a stock 360 car pan with a short oil filter?

Bill I can get all that for you tomorrow ex just a guesstimate on the capacity which I'd say is 4 qts for the sump & maybe 1/2-3/4 qts for the short filter

I did not get over there today (stuff came up unexpectedly)) but tomorrow for sure & its at the top of my to do list

BTW, different years different lengths. 3418933 for 70-74 dipstick tube is 7.875 and 3462049 dipstick is 16 3/4 I have always used 5 quarts with no issues.

I got 11" & 1/16 on the tube and 21" & 3/16 on the dipstick on a 318 and 6&5/8 on one 360 tube (no stick in it) and 6&3/4 on the tube and 16&5/16 on the dipstick on another 360. Bottom line is the level in the sump & I would put 4qts in the sump on a level surface & wherever that falls at on the stick is "full" no matter what the filter capacity is.

Can't help you with the length, but the factory spec for a 1980 360 engine is:

1) 4 qts w/o oil filter change
2) 5 qts w/ oil filter change

Here is what I did to re-establish the LOW & HIGH levels (following the original engine start-up, break-in, etc, etc), given that I replaced the stock tube with the shiny (chrome..lol) MP kit (tube & dip-stick).

1) totally empty system, add 4 qts
2) start engine, shut off after a couple of minutes, let oil drain back to the pan
3) pull dip-stick, clean, re-insert and note the oil-level
4) mark the oil-level as the LOW spot on the dip-stick, I drilled a small hole in the dip-stick to give me that mark
5) add 1 qt to bring the total level to the spec 5 qts
6) repeat #2 & #3 from above
7) mark the oil-level as the HIGH spot on the dip-stick, I drilled a small hole in the dip-stick to give me that mark