Well, I just spent the afternoon indexing 4 sets of plugs. I thought the following information might be usefull.
This applies to 14 mm gasket type plugs. The crush thickness on the stock gaskets/washers ran between .050 and .055".
I bought a set of indexing washers packaged by Moroso (sold by Summit/Jegs/etc.). The set has 10 ea. .043", .054" & .064" washers for $15, or $.50 each. I found that this combo didn't give me enough selection to get the plugs deadnuts.
I went online to McMaster-Carr (
http://www.mcmaster.com/) who I get a lot of fasteners and stuff from. I finally found metric 14 mm I.D. stainless steel washers that fit the bill:
1.0 mm .039" P/N 98089A392 $8.07 for 25 ea (as are all the packages)
.5 mm .020" 98089A348 $6.52
.3 mm .012" 305 $8.14
.2 mm .008" 263 $8.26
.1 mm .004" 224 $7.35
This works out to $.31 each.
I found that a .5 mm and .2 mm washer/shim rotated the plug 180 degrees. The .5, .2 and .1 mm were the most usefull, but I did use some of the others.
Hope this is helpful for others.
Tom