I spent an entire saturday when I was in high school changing a mopar big block fuel pump, on the street, in the cold (december) standing on a snow bank........ You can actually get the bolts started in the fuel pump but you cant tighten it when the push rod is in the way.

When your 16 no one tells you this stuff. Took me an entire day to figure out the push rod fell down.

An NO the beer wasnt consumed during the install, I was 16! (beer happened later, and I have the ticket to prove it! )