[Dwight Southerland]

This is interesting. I have a copy of the Class Guide sheet for 1969 Chevrolet that I downloaded on 1/25/17 after the end of the year factors were added. It shows the factor to be 8.50, which is consistent with the math (3611 ship wt / 425 factor = 8.49647, rounds to 8.50). However, if you look at the same sheet on NHRA's website now, that factor is 8.49 with no indication that any change was made on the sheet. (Dates are included at the bottom of each sheet that documents changes.)

For anyone who is Excel knowledgeable, the formula for that cell was changed from (8.3*435/Q272) to (8.29*435/Q272), so a change was made.

Here is the sheet from 1/25/17. Note the document date at the bottom is 1/1/17, the same as the current sheet on the NHRA website. Sounds like politics to me.