Good afternoon guys n gals. I've been searching for a bell housing to adapt my camper 440 to a A833 overdrive manual transmission. Well, I found a person whose got some older parts (mostly rusty from sitting it looks) and has a few Cast iron bell housings. BUT.. from the pics, it looks like each one has a different bolt pattern that bolts to the body of the trans. SO, how many big block bell housings bolted to WHAT? Do they ONLY bolt to a A833? If so, why would there be 2 different patterns? (that mount to the trans body) Also, Do the older (late 60's- early 70's) Poly engines have the same bolt pattern that would fit the 440? (because I found an older 'yard' that's got a couple older Dodge buses, and they have the poly blocks) Kinda NEED the HELP here before Saturday!! It's about 1.5hr drive one way, and don't want to waste time driving all that way for nothing.. Thank you.