Gulf tank cars
Just some odds and ends:
I found my scale rule and measured the longitudinal course of the IM Type 27 8k tank as 31'7". The longitudinal course of the Tichy tank was 31'11".
Out of the box, the Gould/Tichy tank car doesn't model anything
we know of.
The underframe and a IM 8k or 10k tank can be kitbashed into
early 1920s SSC-built Gulf Oil cars. The underframe and a Tangent
radial 10k tank can be used to make FTX 10073 et al (coming up
with a post-1926 GATX series is the biggest challenge) . A
stretched underframe can be used to kitbash late 1920s NATX cars
(which Speedwitch sells as a kitbash-in-a-box).
The 4-course 10k tank can be mounted on an ACF Type 27 underframe
to model USA-G War Emergency tanks (mostly SHPX, and mostly
rebuilt to insulated tanks ca. 1947). It can also be used to model
4-course Standard Tank Car builds circa 1920: Soo 22504 (GATX
27289) and Norfolk Southern 3008 (GATX # unknown to me). It could
also be cut down to make the 4-course 8k UTL X-3s rebuilt from 6k
FTX 8223 ( https://historicpittsburgh.org/islandora/object/pitt%3A715.261175.CP ) looks to me like a STC radial-course car.