AuroraGirl
Full Access Member
- Joined
- Sep 8, 2019
- Posts
- 9,807
- Reaction score
- 7,044
- Location
- Northern Wisconsin
- First Name
- Taylor
- Truck Year
- 1978, 1980
- Truck Model
- K10, K25
- Engine Size
- 400(?), 350
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this is a 1986 TSB from GM. so over 8500gvw (so C6P 3/4 tons, all 1 tons,) after 1979 need substitute , while anything above 5000 gvw 73-78 need lead substitute.
not sure how many unrestored trucks engines are out there, but figured to post it after I found it
