As in post above only early 200 cranks had the taper.
Recon you need ThreeBond TB1375B Green High Temp retainer to hold all in place. Or Loctite 603 is another make.

Progress report - I made a first test shim to try with the timing cover still off just to see how hard it would be to introduce the damper (I realize the key is out - will replace the key). This is .007 brass shim stock. I formed it to a diameter slightly smaller than the crank so it wants to grab the crank. Aviation lock wire was used to pinch it tight before introducing the damper. I left a lot of extra length on the shim to feed through the middle of the damper while I experimented. As you can see in the picture the shim wants to buckle at the gap . The problem is that the damper has a 45 degree chamfer at its rear and this is too aggressive to feed over the shim. I am going to hand file a very gentle taper in the first 2.5 mm or so. I will make a new shim with no extra length. I then plan to oven heat the damper to 200 deg F or so (95 C). I have ordered a very long M20x1.5 bolt. I will use the long bolt to pull the damper over the shim and hopefully put everything in place.

Loctite 638, fills up to 0.25mm, that is 0.00984 of an inch.

tottot said:

Loctite 638, fills up to 0.25mm, that is 0.00984 of an inch.

Click to expand...

Which as mentioned above is what I used on mine when I had the same happen.

I remember using two pack araldite years ago, it was never any more problem after that