I don't think I've had this much fun in my A-body

That's one badass Valiant. When I get done with mine that's what I want it to do.
That car sounds fantastic.
I had a 73 Duster that was a kick to drive off road. It only had a stock 360 4 barrel but it was so much fun to drift around off road. I ended up doing the body and paint, then sold it to buy an engagement ring. Years later, I bought THIS:

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It has more power, bigger torsion bars and stiffer leaf springs and is even more fun to drive off road.