Car dead

As said ive got power though the fire wall and the red wire runs to amp meter then back out the black to the alternator no power at altenator

You lost me.

You have power AT the ammeter on both posts?

Then you should have something "in the car" headlights, etc

Reach up and wiggle the ammeter connections with the headlight switch on. Any difference?

Make sure the red ammeter wire does not go dead with lights turned on. If so this might indicate a fail right in the red wire at the bulkhead connector or the fuse link.

The circuit path is starter relay..............fuse link..........(red) bulkhead.......... (red) ammeter..........black ammeter ............TO THE WELDED SPLICE in the black ammeter...............to the (black) bulkhead..........to the alternator

WELDED SPLICE branches off and feeds

fuse panel "hot" buss

headlight switch power for headlights only (not tail or dash)

power into ignition switch