You can "T" it if you want. The pumps are the same. It's just the reservoir that houses the pump that's different.

Since I didn't want the crowded look of more than one return hose going to the pump, I chose to use just one hose. Unfortunately, I chose the wrong return nipple.

Before I realized I had made the mistake of dumping the return to the top nipple, I searched around and found a pump from a 2000 Silverado with a 4.3L V-6. Upon looking at that pump, and similar pumps from the OBS series, that's when I realized I had made the mistake. All the pumps without Hydro boost brake systems dump return fluid to the center of the pump. Hydro boost pumps have 2 returns: One to the center of the pump and one to the top. The center return is crucial to keep the pump from cavitating(aerating the fluid).The upper return is merely a secondary return. As long as the primary(center) return is used, there could be more than one secondary return.

So, needless to say, I installed the V-6 pump since I had crimped and brazed the center return nipple on my original 6.0 pump.