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Hola All
If you have a 413 or newer powered Imperial open the hood and notice the
two same sized holes near the rad-ah-rate-tior and the lower portion of the
battery on the core mount structure. This is for the OEM mounted power
steering aux cooler lines. The mount is slightly different from the
Crashlier Division to the Imperial Division even though they appear the
same.
The Imperial for the towing package has a different spec'd transmission
than a regular Imperial.
You have already ID'd the extra/additional transmission cooler, the stiffer
T-bars and the additional rear springs.
Even though it may not have the Hi-Perf 413 or the HP 440 it may have the
same alternator or power steering sized pulley's. The amp's with tow
packages are higher too.
The older Imperial with the 8 3/4 rear axle assembly should have the 3:23.1
gears and the newer ones with the 9 1/4 rear axle will have 3:21.1 gears
when they were built for towing.
If you do tow with your 1959-1978 Imperial you should have 235x75's vs
235x70's since they are rated for a heavier load.
The best HP tow camshaft package for either engine is the MoPar P4286675
assembly.
I like this cause it is very close to the power packages.
Uncle Rodger & Aunt Gabby
COS
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