cat 60 Spark Plug

Does anyone have a preference for spark plugs for a 29 Cat 60?  Need to replace old Champions that are currently being used.  Any feedback on plug part numbers would be appreciated!

I'm using Autolite 3077 with no problems. They're no longer available, but can be found on eBay. Curious to see what others have to say on this subject!

Champion W-89D

Autolite 3077 are hotter and better than Autolite 3076 but the 3076's still work fine.

I posted this chart a few years ago.
Replacement spark plugs for autolite 3077:

Brand and Model
AC Delco
18

AC Delco
18A

Champion
W89D or 44

Champion stk
589

General Motors
5613050

Motorcraft
TT15

Motorcraft stk
101

Stitt
17E/17EX

 [attachment=67257]Champion Industrial Spark Plugs - digipubZ.pdf[/attachment]

i have just found a copy of the champion industrial plugs application chart this dates from 2012