Nice car with what looks to be an authentic build sheet. NOM will hurt the value some, but I don't think the auto-to-4sp change will have any impact...if anything it may be more appealing.
Looks like a good car from the limited info provided - anyone know this one?
A word of caution: Seller's feedback is pretty weird to say the least.
Link to 1970 Chevelle SS396 Convertible auction