Ignition Switch - will it work?

New to the forum here, but im hoping you guys can help me out. My dad has been having starting issues with his '73 Dart Swinger and asked me to replace the switch. No problem right. Well i got the old switch out with minimal problems, but the new switch from the parts house just doesn't look right. The switch itself looks the same but the wiring doesnt match up. The old switch had five wires coming off the back of it, but the new switch has six. Also, the new switch doesnt have the seat belt switch (at least that what i think it is) at all. The wire for the gear position indicator light is also not there. Now pulling them out of the old connector and putting them into the new connector wouldnt be a problem but the are not enough open terminals due to the extra wire coming off the new switch. Thought i had the wrong part but all the new switches i can find are like the one i already have (six wires). Is this the correct switch or not? Or am i just missing something here? Any help is greatly appreciated. Photos of new and old switch included. Edited to attach photos.

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