Setting the timing after replacing timing chain

The timing chain is aligned first to the timing marks and then the distributor.

Yea ik that but when I do it does I have to have it on the compression stroke

That's not a concern. The cam position is what determines the compression stroke.

Ok when we set the distributor on the right seting and firing order the motor tries to run but backs fires these trucks do have pick up coils does that mean the pulse ring doesn't touch it til the motor is moving

TDC compression does matter for the distributor but it isn't established until the cam is set into position. The diagram I gave you should be TDC compression but verify it with your thumb or compression gauge.

INSTALLATION

NOTE: If engine has been rotated since distributor removal, turn engine clockwise until No. 1 cylinder is at TDC of compression stroke.

Clean top of block around distributor opening.
Replace O-ring on distributor housing, and lube with clean motor oil.
Install rotor on distributor shaft
Position distributor into its original position. Engage distributor shaft with slot in oil pump drive gear.
Turn distributor until rotor is aligned with CYL. NO. 1 mark on camshaft position sensor.
Install distributor hold-down bolt and clamp and tighten.
Connect camshaft position sensor electrical connector.
Install distributor cap.
Connect negative battery cable.

Where the the mark for the number 1 align on the cam sensor cause might don't have one

We tried that and still does what it does

Check your firing order.

Checked it five times it sounds like its 180 out and I do have a bigger cam then stock in it

Well, if you thinks it's 180 out then try moving it.

If I do that will it change my firing order

Could it be that the distributor is fully bad

Sure, could be dozens of things. Sounds like you need some local help to get this diagnosed. I can't begin to know what's going on from here.