There are no three-credit classes you can get credit for. A 4 or 5 exempts you from taking W131.
Also, you can get two credits for ENG W143 with that score and a 660+ on the SAT writing test:
-----------------
English Composition
1. Exemption without credit. Students scoring 670 or higher on the SAT Critical Reading test, or 32 or above on the ACT English Composition section, or 4 to 5 on the Advanced Placement English Composition section, are exempt from English composition.
2. Exemption with credit. Some students have an opportunity to receive College of Arts and Sciences credit. A student will be granted 2 credit hours of English W143 if the student has:
1. a score of 670 or above on the SAT Critical Reading test, or 32 or above on the ACT English Composition section, or 4 to 5 on the Advanced Placement English Composition section, plus
2. a score of 660 or higher on the SAT Writing Test, and if the student applies to the Department of English in Ballantine Hall 442. Students should also see "Special Note" under "Credit by Examination" in the Undergraduate Academic Bulletin.
College of Arts and Sciences: Undergraduates
You have to contact the Department of English to get the two credits.