5.0 brackets on my 68?

If you are using an electric fuel pump use the brackets, harmonic balancer, water pump, AND timing cover from a serpentine (79-93) Mustang. The timing cover will need a hole to be drilled for the dipstick. The water pumps for this era are reverse rotation, and there are high-flow upgrades available if you want to run one.

If you want to run a mechanical pump, get one of the universal style timing covers from Summit, Edelbrock, or Ford Racing-- they'll work w/ a serpentine system and already have a boss for a mechanical fuel pump, or see if you can wrangle up a timing cover from a 79-85 Mustang. The timing covers from the EFI cars, of course, aren't meant for a mechanical pump.

Do you have power steering? If not check with March Performance in their 5.0 section for power steering eliminator setups.