86 bronco II won't turnover

I just replaced the valve cover gaskets, the sparkplugs, the fuel, air and oil filter. Now the Bronco will not turnover. The Bronco ran before my repairs.

Check to see if all the wires are on your Senliod Behind your battery on pass. side. Should have cable coming from batery going to starter and 1 or 2 smaller wire on terminals.