These pumps are identical except for a small hole on the side panel on the clock pump to reset the clock,and the frame where the clock unit mounts, is wider than where the computer pump mounts are.If you sit a computer in the clock pump frame,you can only bolt up 2 places instead of 3..The frame is 1/2 inch wider on 1 side in this area..Thanks.Brian....
[This message has been edited by briansbodyshop (edited 08-17-2007).]
[This message has been edited by briansbodyshop (edited 08-17-2007).]