Cf. the final product: http://www.earlyamerica.com/earlyamerica/freedom/doi/text.html
-Changing "we hold these truths to be sacred & undeniable" to "we hold these truths to be self-evident" (a change Jefferson made)
-Congress totally neutering the list of complaints against Crazy King George (the sentences that start "he has . . .")
Jefferson was pretty pissed about Congress abrogating the list of grievances---that section got the most press at the time. But now we remember the second paragraph, which I memorized in fifth grade, and which is Jefferson's writing entirely.
Also Jefferson and Adams both died on the fiftieth anniversary of the Declaration's ratification. But you already knew that.