s14 with a 1uz swap

[Issa__40__]

hey guys so like my title says i swapped a 1uz into my s14 ( dont laugh at me) my swap is finally 100% finished but now car wont start , fresh heads new timing kit belt all new gaskets new tensioner etc ( yes we did the timing correct) new fuel pump new starter etc , car cranks very slowly but wont fire up , voltage drops from 12v to 4v before it heats up and breaker pops ,shops telling me it could be timing but i have others saying its going to be either a bad ground or the wires guage they used to relocate my battery to the trunk isnt big enough , any ideas or local mechanics in the inland empire mind giving me a second opinion?

[PowerDrifter]

you said local but i know 2 shops that have done 1uz swaps including mine that can take a look. one in long beach and another in hawthorne

[Issa__40__]

i had my car at POP SHOP in long beach but they had a bunch of other cars that needed work done so i towed it out so i wouldnt be taking up space since they had already done their part installin the motor , now i just need someone that can diagnose whether its an electrical issue or timing is off