slant six bellhousing pattern
Here's a pic of a slant bellhousing I found somewhere. This one is for a manual tranny, but the flange to engine is the same on all of them. Of course, you can't measure bolt distances on a picture, but you could print ot out and take it with you. Notice mostly the starter motor placement, which looking at the pic is high to the right. It's a different place then on other Mopars.