Oil pan dipstick problem
looking at a car I just received in trade. Its not been on a hoist yet and won't be till it gets warmer. Here is the problem, checking the oil, I find the dipstick is broken off. Talked to previous owner, said he just had someone change all fluids. Has no idea how many quarts of oil were installed in pan. Aftermarket oil pan, not sure of capacity. 5,6 or 7 quarts. Its stated to me that its a 383 stroker engine. My question is this, does the oil level remain constant with all pans? I,m going to replace the dipstick and filler tube. Don't know if I should use a 19" or 21" dipstick. I can drain the oil to determine how many quarts were used on the oil change, but don't know if the right amount were added. Once it gets warmer I can get it on a hoist and check to see if the pan has any marking as to manufacturer. Again my main question is, does the oil level remain constant when checking levels no matter what the capacity of the pan is? Any and all suggestions will be appreciated.