Slant 6 Distributor Hold Down

Badvert65 said

This picture shows how the later clamps fit on the later blocks. If you look closely, you will see the small ledge cast into the block for the claw to rest on. The older blocks (I am uncertain when this started) do not have the ledge and will need some provision to apply leverage or pressure to the distributor ring to effectively hold everything snug.
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So, I guess I am out of luck? Ok then, when I install my new distributor, I guess I need to use the old bracket. It will be easy to adjust the underside of the bracket witht he distributor off. So, I have to ask, should the underside bolt be adjusted in the center of the slot? I am going to install the new distributor when the engine is at 10 degrees BTDC, as mentioned in the new Doug Dutra book. This is the static method according to the Doctor.