You have done what I should do - narrow it down a bit. The kit has many redundant tools in it and I should thin it out.
That's why I don't buy pre made kits except for use in a garage. My first mobile kit started with an old Craftsman clamshell tool box and I slowly filled it with tools as what I commonly need. What you should do is get small kits, like sets of sockets or a small roll of wrenches and combine them into the kit you need. Leave the big case you have for the garage. Part of the reason I changed to a bag was to make scavenging parts from the local parts yard easier. Carrying around 50 lb. tool box gets annoying after a while. I still keep the box in my Bronco, but only because I don't have a garage to keep it in instead.
If you're dead set on using a pelican case, you should do what the tool crib at my base does and make a CTK (Consolidated Tool Kit). They take a pelican case and some hard foam board and make tool trays that they layer inside. Each tray is made of two layers of stiff foam, the bottom for a backing and the top has spaces cut to hold the tools. They then stack each tray inside the case for max space usage. Do it right and you can get an impressive number of tools in a small box. In fact, you should see what our full sized tool boxes have in them.
I do need to get some kind of roll for my wrenches though. Its a real pain having to search through the bag for the right one.
Here's an actual list of what I've got in mine:
3/8" ratchet
3/8" SAE deepwell sockets
3/8" Metric deepwell sockets
3/8" "multi wrench" shallowell sockets (on the steel strip)
1/4" ratchet set (small craftsman set my grandpa got me years ago.)
3 different vice grips
pipe wrench (more useful than you'd think.)
full set of pliers (needle nose, wire cutters, square tip and basic pliers.)
Full set of screwdrivers
2 adjustable wrenches
ball peen hammer
Cutco super shears (I HIGHLY recommend them. They'll cut almost anything!)
various common and specialty wrenches
LED flashlight
Hand turned "easy outs"
three blade pocket knife
The bag itself I got from a military surplus store and is actually sold as a travel satchel, but its tough enough and has enough pockets to make a nice tool bag. And the shoulder strap is REALLY nice for when I got foraging in the junkyard for parts. All told, my kit weighs in at around 20 or 25 lbs.
This bag lets me do 90% of the work on my bronco. The other 10% I keep in a separate tool box and contains things like torque wrench, adhesives, gasket material, RTV, silicone sealant, coolant tester, extra hardware, various electrical wire and connectors, small butane torch and a few extra sets of pliers and wrenches.