SYE/T-Case Drop

Question, couldn't find anything regarding this,

Obviously when I get a SYE done I want to remove the T-Case drop, but would having the T-Case Drop installed or not change the measured length of driveshaft needed?

I'm thinking I will have to first remove the T-Case Drop before measuring for a driveshaft, correct?

correct, take out the drop, install the SYE and then get your measured shaft length

It won't change it enough to matter.