project 87 done but won't start lol. Help needed

[weider1717]

it's been over a year due to job etc but all i did was take all accessories off blasted and painted them.

put rebuilt water pump on restored exhaust manifolds and hardware, all new belts, hoses etc etc etc.

I can hear my LEFT tank prime and the right tank won't work so I made sure the switch didn't get bumped out of position and even tried it both ways then back to the left tank which again I can still hear prime as normal.

topped off with new coolant and dropped a new battery in when to fire her up and she just turns and turns over with nothing but turning over.

only a couple plug wires got unplugged during this and i made sure to look and what number went to what cylinder so thats not the prob although i WILL go back through to be sure.

besides older gas not sure on this one shoulda fired right up!

help appreciated guys