Clutch question

I'm in the process of replacing my clutch center with the new hardened version and could install it in either of these two baskets. The one on the left has six holes in it but the one on the right has none. Can anyone tell me if one style is preferred over the other?
The center has been removed from one already and I have taken the snap rings off the other one.
I'm curious to learn if one was an early type.
Thanks

The current clutch basket sold by AN has the same holes so that type is probably the latest version.

https://andover-norton.co.uk/en/shop-details/15854/clutch-chainwheel-c-w-backplate-06-0742-

Thanks, I see that now. My bike came with a box of spare bits but most of it is junk. I'll use the one with the holes.

When choosing the correct shims to go behind the basket, is it a matter of using a straight edge to line the drive sprocket with the clutch basket or is there more to it? I would rather not blindly trust the previous assembly although the triplex chain and sprockets look good.

know_fear said:

When choosing the correct shims to go behind the basket, is it a matter of using a straight edge to line the drive sprocket with the clutch basket or is there more to it?

Click to expand...

A straight edge should do it.

Great, that looks easy enough.
The hard part is waiting for the bits to arrive!

know_fear said:

Great, that looks easy enough.
The hard part is waiting for the bits to arrive!

Click to expand...

When waiting for parts time seems to goes by in negative dog years. Christmas morning when they do arrive.