Help needed Starting Issue 66 Dart 273

What do you mean

"it won't start"

What do you mean "noise from the starter"

BE SPECIFIC AND PROVIDE DETAILS

"the starter cranks the engine but it won't fire"

"the starter cranks the engine and it fires and dies"

"the starter will not crank the engine, sounds like the solenoid is buzzing"

"the starter will not crank the engine, it clicks once and then nothing"

WHAT EXACTLY does it do?

IS IT GRINDING the starter gear? If so, you need to go right back to THAT, and since you've changed the starter, about the only thing left is the RING GEAR

Have you tried jumpering the two solenoid terminals?