Are there any differences between the power steering pumps for a hydroboost equipped truck and a non-hydroboost equipped truck? Does the hydroboost pump have a higher output? Are they compatible? I'm tired of changing out my stock pump every few months. Autozone always warranties it (got the lifetime warranty), and I know I should shell out the dollars for an AGR pump, but I was wondering if switching to a hydroboost pump would help at all since Autozone will give me one on warranty.