I successfully had the Motorola fan drilled out yesterday and now it fits the Delco alt. just fine. I checked it against a spare Motorola alt bracket and it fits the stock Motorola mounting holes. I asked the guy what I owed him and he said whatever I wanted to pay so I gave him 10$. It was well worth it to me. Now the only other obstacle is going to be clearance on the steering box to adjust the belt tension. You know I am going to have a problem there. I have a belt 5/8" shorter than stock that might help and I am not afraid to grind a little on the steering box or alt. to make it fit. I hope my mechanic enjoy's his 4 day weekend cause first thing tuesday morning he will be looking at the Delco installation AGAIN!!!!!!!!. Have a good day all. "Doc"