my 351w still wont kick ive replaced the battery, cables, starter, starter soloniod, ignition mod; whats wrong does anyone have a suggestion (the engine isnt locked up)

 

You need to take a test light and see if you have power to the small wire ( 90 degree molded terminal) at the starter solenoid when the key is in start position. If not the problem is most likely a bad netural start switch located on the transmission shift lever shaft. Usually 4 wires, 2 for backup lights, 2 for netural start. Red/blue I think.