Ok, if anyone read my Isuzu diesel thread... that's a no go now. Check it out if you want to know the story. Anyway, back to my original plan and finish building the Olds 455 I have in the garage. Now, a roadblock I have is how to mate the 455 to the SM465 I have? I've looked at some Olds bellhousings, but they don't look like they have the right bolt pattern? Am I going to have to use a Chevy bellhousing and use an adapter to mate the bellhousing to the block?