How to Read Underbody Dimensions

[Peter]

I clamped new rear torque boxes in place as per measurements taken prior to removal. I was hoping to verify as per the attached drawing I found on the site but was scratching my head at the horizontal measurements (the vertical ones are straight forward). The torque boxes match the drawing if I add the red circled dimensions together (66.86 + 11.15 = 78.01). Did I read the drawing correct? Also, not sure what the A represents at the end of the dimension (listed on the forward 4 dimensions).

Any help reading the horizontal measurements is appreciated.

Thanks

 

[Hemikiller]

Yes, that looks correct to me. There should be a "zero" point on the chassis 11.15" to the rear of the steering box bolt. The "A" indicates that the location is in the "negative" relative to the Zero point.

I've attached a PDF of the chassis drawing you can print out that's clearer than the screen print you're working with.

 

[Peter]

Awesome, much appreciated. This is my first restoration project and I prefer to measure twice and cut once lol. It makes sense now.

Thanks from Canada