Don't use a universal set of crimpers and hope for a good connection. Using the right tool makes the difference between a good job and a great job; especially when crimping electrical connectors. MSD Weathertight Crimp Pliers 3511.
MSD 3511 Weathertight Crimp Pliers
MSD Ignition 3511 Weathertight Crimp Pliers For Use with Weathertight and Seals
MSD 3509 Weathertight Crimp Jaws for 35051
MSD 3511 Wire Crimping Tool Steel Frame Insulated Handles Weathertight Terminals
MSD 3507 Pro-Crimp Dies Wire Crimping Tool;Amp Lug Terminal; Fits PN[35051]
MSD 3508 Plug Wire Crimp Jaws Replacement Part For PN 35051