I have some questions I hope someone can answer for me . I inherited my dads 1977 power wagon adventure 150 , he bought in 79 from a car lot it has a 400 big block with a manual 4 speed . Growing up he always told me it’s a special edition and as I’ve tried to find other dodges just like his or mine now with the 400 manual 4 speed I have no luck it’s usually 318, 360, or sometimes the 440 and always an automatic so could it be a special edition? I’ve tried looking up the vin but it just tells me the basics