Difference between Bug and Bus engines?

[KTPhil]

I have a B6xxxxxx engine in my '69 Bus. It's got dual port heads and an alternator, but that's about all I know about it right now.
The tables here suggest that Buses that year had engines in the B5xxxxxx series, and that I have a Bug engine in the Bus.
What is the difference? I never knew there was any.

Of course the air cleaners, tinware and such are different. But why would the engine blocks be different?

When I get the Bus home I may learn more (it's about 200 miles away), but in the meantime this is confusing me.

[Xevin]

I think it’s just the “Ear mounts”. My ignorance can’t describe “Ear mounts” for a Type1 in a bus vs a bug. Somebody here will though. And possibly more.
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Keep on Busin'

[KTPhil]

ok, maybe you mean for the rear the engine carrier?

My last Bus was a swing axle '65 and bug/bus engines were interchange on it.

On a related note, I may change the carb (I can't remember what it has), and I am not a fan of the 009 mechanical advance distributor inmost cars, but especially on a Bus where high rpm horsepower is not the need, but flexibility at the low end is important.

What combo would have come on this engine (B5 or B6)?

[richparker]

[KTPhil]

I know it's not the original engine, yes. And with it not here yet, I am just guessing based on the serial number and gross equipment I can see in a pic.

I don't know what the rear mount looks like, and won't until it's here and on a lift, at least a week away.

I suppose one could have put dual port heads on a pre-'71 engine.

On other VW engines, I found the 009 made for more power at higher rpm, but sacrificed the lower end power and smoothness the vacuum advance gave it. So in traffic the vacuum-equipped distributors seemed to make for less shifting (as well as somewhat better mileage). But I'm guessing for this engine. And with the non-stock (for that year) dual port heads, it's kinda moot what it originally came with.

[richparker]

[airschooled]