See post 11
If I remember correctly, there are basically 4 frames for these cars:
Somebody correct me if I'm wrong.
- "The regular one", which is used on all civilian b-body sedans (SS, civi Caprice, Roadmaster)
- The 9c1 frame, which is basically the same, except beefier
- The wagon frame, which is fully boxed, longer, and wider than the sedan frame
- The Fleetwood frame, which is basically the regular sedan frame, except extended by about 6"
Isn't it a known fact that the 9c1 frame is stronger?
The only important differences between a civilian frame and a 9C1 frame - that has been OBSERVED by ISSF elders (some of whom no longer visit the ISSF) - are:Way back when we had a big discussion about the reported frame differences.
If I recall, we found that once people were comparing the same places, apples to apples,
could not see a difference.
"Heavy duty full perimeter frame"
doesnt say the other cars dont
Oh, and from the parts book
View attachment 193867
No mention of model year, or the method by which these measurements were obtained. How accurate are factory frame castings? Are they always going to be perfect when measured with the proper instrument?Civi Caprices - 0.100"
Roadmasters - 0.110"
9C1, Impala, Wagon - 0.125"
Fleetwood - 0.135"
A guy on the 9c1 forum confirmed these numbers by measuring a bunch of B-bodies. But he did say that he got a few Civi Caprices that had the 0.125" frames, but no 9C1 or Impalas with thinner frames. It may have been civvies with the V92 towing prep package. He did not say.
Wagon frames are fully boxed.