Looks like a good base to work from, if you need parts, I strongly suggest Jet Boat Performance.

The boat had a 460 that the previous owner took out (three point set up) and I am going to put a BBC on a 4 point mount in.  I bought a complete motor and mounts from river dad (thanks Jason).  He gave me a great deal.  I didn't get the rear feet for mounts and no one had them for the Nicson rear mount that I have.  I was told that there was notch in them that would help support the weight of the motor.  So after trying to find them I decided to make them.  I have to go back out and finish them up. 

The first pic kinda shows the half round slot in the motor plate.  I copied the front mounts for the rear but I am just gonna beef them up a bit.  I will post more pics soon.

Here is the update on the feet.  I fit a piece of round aluminum between the mount and the slot that I put in the mounting feet.  I still need to trim them up and sand/smooth 'em out a bit.

I know what you are saying hotrod56cars but I am hoping since I will be putting all of the mounting holes into the stringers that I can set the angle that the motor goes in at.  I have never done this before so we will see what happens.  I had called all around for the feet and once Josh @ JBP told me the feet were not available for that I decided to make them.  All in the learing process. 

Try this...
http://www.hardin-marine.com/SearchResult~CategoryID~203.aspx

Found the photos;

if ya still need the feet i believe i have a set

Well, the feet I made didn't work.  SNAFU.  I might be able to get them to work but now I just rather buy a set. 

That suks. But at least you have found the answer.