@David - Thanks! That was the link I was looking for- it's just hard to search through all the information on this site!
@Jerry - I was worried for a moment, but under a thick coat of grease and grime there are generator holes!
@Bob - There is an odd flat spot on the side that I haven't seen on other blocks, so that might be where the fuel pump went... I'm hoping to find power unit pictures just to see if that's the case...
@McBride - I spent all my money on torches, welders and scrap metal... they'll make it fit too!