Short story and a few questions.....

Hello everyone... New guy here with a short story and a few questions.

My dad and I built a 1966 Valiant v-100 5 years ago. Started as a slant 6 car and ended up being a 360ci, 450hp, street machine. Engine was built by Best Machine here in MI. Alum intake and heads, Wilwood discs, dougs headers, 8 3/4 rearend.... the whole nine yards. It was a father and son project that we spent two years building in my dad's two car garage.

Not trying to bum anyone out, but to make a long story short, my father was killed in the car the first time he drove it. I unfortunately witnessed the accident. Something on the car broke or was loose (I am thinking tie rods or something with the front end) and the car veeered into oncoming traffic and my dad was broadsided.

Moving on.... My dad was a HUGE mopar guy and left some parts laying around that I have been getting rid of for the last few years. I just cant do the muscle car thing anymore... For the most part, alot of the stuff is gone now except for a crossmember that is still in my basement. I believe it is a Early A body V8 Crossmember but I am not 100% sure. How do I tell the difference between an early A v-8 crossmember and a later A body crossmember? 2nd.. If I do Have an early A body crossmember, what would it be worth if I wanted to sell it? An honest asking price? I am looking to get rid of all my car parts. Leaving the muscle car game as that Is something that I did with my dad and just cant get back into it.

Any help would be appreciated...

Thanks,
Jeff