Sandy,
Check the first two boost/starters on this link:
https://anewwayforward.org/best-jump...er-for-diesel/ They are the only ones I've found on Amazon.com that are rated for a diesel engine above 6.5 liters in size. Our 6.7L engines will work with the first couple, then the "engine size recommendations" fall off below our cubic inch size diesels.
One is $300 the other $90, so take your pick and remember you may not always get what you pay for, on the other hand, you do usually get what you pay for.... It's a "buyer beware" for sure.....