Ali sumps

[Tony Press]

As I said-

I have a 1929 crankcase with a large alloy sump (1 gallon?) and use the standard 1929 dipstick.

My understanding is the dipstick in the early crankcase rests on a ledge above the floor of the sump so the deep sump doesn't affect the dipstick or its full reading.

I don't know about the sports dipsticks but from the picture they rest on the sump floor..