I'd say drop it out the bottom since you're plannin on changing the K-member anyway but Idk if it's possible to drop a 383 out the bottom or not. I just dropped the 318/904 out the bottom of my Duster a week or 2 ago. Did it by myself easily, but like I said, Idk if a 383 can be dropped out the bottom, I've never had one or worked on one.