The Rover-Landers of BC

Thought I'd post this here as well. I've got a thread going in the wanted section but at this point i'm more interested in the information and figuring out what exact part I need. Once I have theat info I'll be able to find it somewhere.
I'm doing a conversion using the Marks4wd chev v6/v8 to zf4hp22. I'm looking for the correct flexplate bolt pattern to match up with the crank adapter from marks.
the holes are:
crank Opposed: 10 cm apart
crank Adjacent: 7.1 cm apart
center hole: 6.3 cm diameter
Torque converter opposed: 22.7 cm
Torque Converter Adjacent: 16.2 cm

I've ruled out a disco 2 flexplate fitting. I know the range rover classic has the right bolt pattern but still waiting to hear back about the diameter of the center hole. I'd be very interested to see get the measurement on a disco 1 flexplate.
Disco 1 'seems' to use the same part number as the disco 2, however one site I looked at had two identical part number entries, one for the d1 and one for the d2 with a note on each that it would not fit the other.

If anyone has a flexplate out and can tell me the vehicle/year it came from I'd be very thankful if you could take a few quick measurements and post the results.

marks4wd lists the following on their site:
Note:
Late model 4.0L and 4.6L Range Rovers from 1996-2000 with the Borg Warner transfer case have a different flex plate bolt pattern and torque converter, they need to be replaced with one from an earlier model fitted with the LT230 transfer case, this will enable the use of our kit.
Range Rovers fitted with the Borg-Warner viscous transfer case built between 1989-94 also have a different flex plate, torque converter set-up and will not fit our adaptor kit, you will need to purchase a flex plate and torque converter from a vehicle fitted with the LT230 transfer case.
It will not suit the 4.6L BMW engine and later.

However it doesn't make mention of either the discovery line nor does it specify what about the different set ups wont work. I am guessing at this point it has something to do with the different depths that the torque converters sit in the bellhousing as well as the bolt patterns but it is impossible to say without getting measurements. So far marks has been irritatingly cryptic in their answers and are now closed until mid January. :(

Thanks to everyone who has helped in the wanted thread i posted and thanks in advance to anyone who can post more info here

Rob

seems like i have my answer for the most part. the flexplate range rover with 3.9l v8 should work according to measurements. I'm still not sure why marks cites compatibility issues with the range rover models using the BW t-case.

I'm guessing something to do with the depth of the torque converter from the transmission face as the only differing parts on the 3.9 crank to ZF autobox seem to be an assortment of varying size shims between the crank and the spacer that the flexplate and everything bolts to.

I'll know more when I get my parts in hand and start playing with it.

EDIT to add:
Yes it fits! I also finally heard back from marks and confirmed that 3.9l v8 and earlier will work as well as some 4.0L v8, provided they were not from units mated up to the electronic version of the 4hp22.
Now I can commence waiting for more parts before doing anything! :)