need help with wiring sawp ls

[nawafy29]

hi everyone and I'm hopping I'm in the right place to ask  i have comanche 92s mj and i have a swap LS1 5.7 and kinda wondering about the wiring since my mj kinda old or and i have 2000 wiring so any suggestion for shorten the wires /cables or replace with something else or telling me like what i need and i don't need and such as or where to look at and search for

 

thanks in advance

below is my project