Re: Motor and outdrive identification -
looks to me like a mercruiser 470 version engine w/ an alpha1 drive..
if your looking at the fuel pump. to the left of it and about in line with the bottom of the fuel pump bowl. you should find a s/n tag.
your best bet would be to get service manual #8, confirm proper manual by s/n + get #6 for the drive. ebay, mercruiser are a couple of places ya can get the s/m..