I have a New Process A833 GMC pickup overdrive that might be the same as yours. Pro's are the transmission is tougher than nails. Cons are: there is a long jump between second and third because third is the old fourth [ 1 to 1 ratio] and forth is the old third only with different gear ratios to make it quite a bit faster ,[overdrive]. The bolt pattern to the bellhousing is different from some Chevies or the Dodges.