Dip stick info:
49-57 Passenger
53-55 Corvette
47-55.1 Comm., Util (ex. D-D, COE)
15 3/32" under washer to tip end
13 5/16" under washer to full line
13 13/16" under washer to add line
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55.2-57 All (ex. D-D)
15 7/16" under washer to tip end
13 1/2" under washer to full line
14 13/64" under washer to add line
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58-59 dip stick is different from above
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That is a great summary of the dipstick measurements. I just went out and measured the dipsticks on a couple of '58 and later 261s:
15-1/2" under washer to lower tip
13-3/4" under washer to full line
14-23/64" under washer to add line
The tubes extend about 7-1/8" above the block
I also measured a dipstick from a 1953 passenger 235 (the felt) washer was missing):
15-1/32" under washer to lower tip
13-1/4" under washer to full line
13-3/4" under washer to add line
The missing felt washer is probably the difference between my measurements and oilrag's.
The tube extends about 6" above the block (a 1954 261)
it that what we really need to know is how far below the lower flange of the block should the oil level be, with the filter full of oil. It seems that that distance may be not be the same for early and later engines.
Hoyt