I changed the distributer and its doing the same thing what do I try next could it be thw igniter

Module in distributor would be my first try

You also may have turned the wheel and its now has to much stress to turn thw key. Try moving thw steering wheel while turning the key see if it will turn. If it turns hard one way good chance its locked and just turn it a little should get it to release

ground distribution center located.????? Doesn't have a center , has ground points - engine block - ignition ?? System ??? coil - module etc.... What engine ???? 4.3 l G-107 & G-105 G107
In the left rear of the engine block next to the knock sensor
G105
In the thermostat housing

What make vehicle ,model an year ? Most newer vehicles the ignition switch is an input to a module an the module BCM -body control module energizes relays that power up the vehicle systems . .You can go to www.bbbind.com for free wiring diagrams an power distribution diagrams an see what these systems have in common , it could also be a ground side problem . On the home page at bbbind click on technical information , five box will pop up . click on tsb's an free wiring diagrams. Next page go to the bottom an click I agree . On the next page click wiring diagrams an then enter your vehicle info. Under system click on electric distribution ,subsystem click power distribution first ,then go back an check ground distribution

Ignition fuse ? Are you trying to start the vehicle when the fuse blows or with out doing anything ,just put a new fuse in an it blows ? You need a power distribution diagram , to see what all the ignition switch powers up. Then you can check each circuit to see which is at fault . Free wiring diagrams at www.bbbind.com . Just click on technical information , then click on tsb's an wiring diagrams on the next page you will see END-USER LICENSE AGREEMENT , go to the bottom of the page an click I agree .Next click wiring diagrams an enter your vehicle info . Then system , electrical distribution - subsystem , power distribution . Click on search an then click on each link to find ignition power distribution .

Try changing the fuel filter

Yes you can change,the timing still doesnt change the only thing will be,powering the distributer,how many wires?

DId you check your distributer out? Not the Cap but the main distributer itself.

check all fuses in power distribution center near battery and make sure all wires you removed from starter went back on starter and not hanging somewhere. There is a possibility that before you changed the starter there was something wrong that was causing the starter not to operate. Also check that power is going to and out of the ignition switch and starter relay (relay also powers up the ignition system which is why you have no fire)

All the things you replaced were a great place to start. I would suspect the ignition coil. approx. 119.00 for OEM a lot less at the parts store.