yea, the center has to be spun out and a new bolt pattern drilled. toyota has 6 bolts, but one is oddly placed. toyota patters is 6 even bolts.
Like Rabbit said, the center hole on the flywheel must be opened up. 5 out of the 6 bolts are degree'd the same. But the pattern on the VW is a larger dia. then the toy. Some put a vw pattern inbetween the toy's, some slot the holes out. Some open up the holes

I welded one of the toy holes, slotted the holes out to the right dia. then put a new 6th hole in.
works just fine? this is one of the swaps im going to be doing in the future. but im gonna use a rebuilt DE 2.0 TD and i will be bolting it in a lifted 89 4Runner. my swap should be slightly easier tho, as the DE has 8 FW bolts and so do V6 yotas. and they are all evenly spaced. so i should just have to make the holes longer or shorter, spin the center out, and be good to go.
I think I'll have the adaptor and flywhel on before I can get anyone to help me get it off the engine stand!

Anywere I can get good info on the DE 2.0 td? I was thinking about one of those in a 70's series II rover with a toy tranny.
The only thing you might need to look at is if the FW bolt patterens have the same Diameter.
400 lbs is not light
a small block chevy is 525 or something dressed running.
i can not lift 400 lbs, i dont care what anyone says. and i can pack a whole 1.6 MF.
a 22r weighs 315 lbs fully dressed. i can pack one of those too..
Pretty soon, yer Rabbit ain't going to be the only one with roids!!!!!
you want to see a pic of me with an entire engine? sorry but i dont have one complete enough layin around.