Need help with 5.3 lm7

[LS BOWTIE GUY]

So i just put together a 5.3 and put in truck got everything hooked up and when cranking ,sounds like timing is 180 out, pull valve cover and confirmed #1 piston at TDC and #1 intake and exhaust valves closed so that should be compression stroke. What am I missing

 

[MILO]

do you mean a 5.2 it could be the pick-up plate inside the didtributor