What bellhousing do I need?

Why would he regret it? Sure the /6 is one of most reliable motors ever but power wise? Every /6 truck that I've owned couldn't pass a 68 VW bug going up hill. Had a couple /6 B bodies and they couldn't pass a VW van goin up hill. That is pretty sad. An A body is the only thing I'd have a /6 in. There I said it.
Finding all the cool bolt on happy **** for the /6 is getting hard to find.
Because I said so. That's why. lol

What do you mean all the cool happy ****? Hell, finding slant sixes themselves is getting tougher to find. All the time.