Vetster88

I have a buddy whose in a pinch with his 1982.... He needs to replace his pump. So I was wondering if the pump from an 1984 would fit?? if not what are the difference's. The pumps look similar in the pictures at work but have a different part number... only off by one digit.... makes one wonder. If no one knows I'll make a call in the AM to a couple companies.

Any and all help would be great
Thanks
~Dane