Myspeed123

So I was dumb enough to buy one of these E-bay Taco-Taco fuel pumps. Problem is that the nipple is smaller then the staock one. When I put the two collars and O-ring on they move around a lot, but it seems to make a seal into the fuel collar. Is this going to make a good enough seal or is it going to leak. Also if I cut the main line off and replace the O-ring nipple insert can I put a peice of hose onto it and a couple hose clamps and call it good? Or wil that leak too?

Here is the link to the fuel pump I got. HELP with my options?

http://cgi.ebay.com/255-LPH-HIGH-PRE...item33559b2b7d