Thanks 962, What I meant to ask was,
Do the two outer holes in my 73 floorpan match the take-up points welded to the pan on a post 75 tub? The two holes I’m referring to are just behind the wheel well on either side. Here’s a shot of the RH one:
I checked the hole spacing in my car & get very close to 1215mm center to center. The 75on diagram states 1200mm ±2 (Dimension C). I’m wondering if these weldments are visible on a 1975 chassis.
I’d say these floor pan holes in the older cars is in the same general location as the take-up points on a 75on chassis but not meant to be points for taking measurements. Perhaps they are only drain holes?
Here’s a copy of the page that talks about Front End Gauges P863 & 863a from the 75on supplement. They mention the use of a tram gauge to check points to the rear of the car.
Charles
The older pre 72 Workshop Manual has a couple of pages & a diagram referring to Celette measurements but no layout with dimensions. I hope I haven’t confused things further & welcome any comments or corrections,