you can run the rear so many ways. and they all will work. the rear of my caddy i have two pumps alum blocks old school funnerstone pump heads #8, 3/8 checks #8 hose 16" cylinders. the caddy does a standing 3 easy. i'm also resdoing the rear to one pump two adels this time im running a #6 marz. and yes it will still goe from the bottom up at each corner and do a standing three.