I bought some 3/8 compression to -6 AN fittings off eBay.... I just had an OEM plastic clip fail on my 04 Impala at the fuel filter. Granted mine are 8 years old, but my suggestion is to pick up a few extras...
For my fuel pump I chose a factory pump for a 2005 Silverado/Sierra that is internally regulated. I am building an oversized tank, 13" deep and will be perfect for the fuel pump assembly.
www.vaporworx.com makes a ring (or a kit) out of stainless or aluminum to mount the pump using the factory o-ring and cam lock. If you need a tank thats not as deep (lowered trucks,) they designed the system to use the Gen5 Camaro or CTS-V pumps...
