fuel tank sending unit

Hi all this is my first post here. I changed out my fuel tank sending unit today easy 10 minute job i did a few piddly things then started the car to go home and it died rite away, I restarted it and it ran like crap all the way home not wanting to idle acting like it was fuel starved the only...

Does anyone have a link to a "How-To" about changing out a fuel tank sending unit on a 1966 Mustang coupe? Seems pretty straightforward, but I thought there would be some "tips & tricks" out there somewhere... Thanks!