I did that too this winter. Was taking my custom fuel line off to measure it and figured hey while I'm doing this, what a great time to switch back to my stock HPFP and load up my old AJP Turbo tune and see what it runs on dragy.
Started it up and gas was dripping down the front of motor right onto the exhaust. Thought I didn't torque the bolts enough, so gave them each another turn and SNAP. Bolt on the right sheared right off. Spent an hour or so getting the bottom half of bolt out, another couple hours driving around to various junkyards looking for the bolt, ended up getting two at the dealer for 12 bucks.
Somewhere in there I realized I had put the plate on upside down, but had already spent enough time that I no longer gave two sh*ts what that old tune ran and just put the LMS pump back on and called it a day.
Next day I was doing xmas shopping and drove it about 10 miles, went thru the mcdonald's drive thru then parked to eat, left it idling since it was about 20 degrees outside, next thing I know it's idling rough. Shut it off and pop the hood, notice the rear side of the fuel line had somehow popped off, and gas was pouring right down on.....yep you guessed it the rear downpipe! Shocked (and very lucky) it didn't go up in flames.