These will work in any automatic transmission from 1968 up to 2004 including the 722.6 transmission. The 7G 722.9 has magnets in it.
Kent is a firm believer in using these strong magnets inside a transmission pan to help extend its useful life.
Automatic Transmission Inside Pan Protection Magnets x 2
$9.60
SKU:
TRS-MAGNETS Product Details
They should be placed toward the rear of the pan as shown in the picture below.