Autolite double platinum plugs? Also indexing?

[SSDiv6]

Originally Posted by art leong

Are those 25mm (1") reach with a tapered seat and 5/8 (16mm) hex?
Those are the parameters I need

The specifications show the lengths as follows:

The Champion 470 is 25.5mm (1.00") long.
The Autolite AR3932X is 25mm (0.984) long.

The Autolite plug is also shown as a plug application for the late model Hemi engine.
It may not require adding the washers as you want to.