Well,

Good and bad...

The dyno operator was not having a good day and was having issues getting the dyno to behave.

The truck overheated a bit as they kept wanting load runs done to sort of the dyno.. not good.

We did manage 2 full pulls though - no graph just the number - 280HP at the rear wheels - in 2nd gear - in 3rd it would have been more.

51 GMC 4.2 turbo
Can't solved today's problems using the same technology/thinking that created them