i just installed a gsr swap in my car and i cant get it to start what can i do, im not new to the game i just would like some helpful info to get me started in the right direction, timing is good , plugs an clean all plugs connected and properly wired , but still wont start

ok never mind i had the dizzy a 180 degrees out , but yeah another problem the header i have is to short

 

oh sweet jesus.