All tranny bolt pattern the same???

[Panelfantastic]

I see a lot of posts about different VW and Porsche trannies being used and it seems the only real fit problem is chosing the correct flywheel and pilot bearing....
Am I missing something???
Bellhousing pattern on T1 tranny the same as bus tranny, the same as 901, the same as 915, the same as 930..... they will all just bolt right up to a T1 or TIV block ????

[ppp]

i've used T1 , T2 and now 930 and they have all bolted right up to T1 and T4 engines.

[Yaninnya]

So I can bolt Porsche 911 engine to Betlle g'box (in theory of course)?