Quoting Elijah Scott <imperial1971@xxxxxxxxx>:
> I seriously doubt that any Imperials left the assembly
> line with the cross rams (but it was possible, 'cause
> in the '60s, you could order dang near anything). But
> it would have been very easy for buyers to have
> requested them and have the dealer install them.
In order to get a proper conversion to the 375 hp 413, in addition to the cross
rams, you would need to also replace the cam. There may be more internal
differences between a standard 413, and the high output 413 of the letter cars,
but the two major performance mods are the intake manifold and the cam.
Installing the manifold with the stock cam may have negative effects. Would a
dealer undertake such modifications?
D^2
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