I'd take those spacers out. the only thing they are good at is bending the bolts when you hit something on the skid plate. measure the new driveshaft length with the spacers gone and SYE in. then talk with your driveshaft guy and see if you need a CV or not based on the new length/angle. If you lift is 4 inches or so I'll bet you'll be fine. You'll gain some DL length with the SYE installed verses the old slip yoke which will help with the angles. At the very least the SYE should offset the removal of the spacers.