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Mike, I have done a few of the Lakewood alignments and do not agree with adjusting the engine to fit the bell housing. (The offset dowel method)
I think the bell housing should fit the engine. Welding is not permissible in some applications so the welded washer method is also out.
Here is how I do it…
The adjustment needed is usually not much, .004 or .005 and I use a gun-smithing technique. If you peen the side of the hole for the dowel on the bell housing against an anvil (can be any heavy metal piece), it will move away from the peening. A few good whacks with a hammer will achieve this. Then by filing with a rattail or chainsaw file on the opposite side of the hole you can move the bell housing to suit. After a little trial you can move it all over the place. It is no big deal to get it all within .001 of center. No parts required, no waiting, and the engine dowels are still where they belong if you want to go to a different bell housing.