[Elecraft] KX3 on SSB Mobile

[Dauer, Edward]

I am about to do a mobile installation of a KX3 and KPA-100 (with KAT-100)
in an old SUV (a 2001 Infiniti QX4, the functional equivalent of an old
Datsun pickup truck), with the hope of putting rare western counties on
the air, SSB.  I have not operated mobile since 1973, and haven¹t used any
mode other than CW since about the same time.  Hence two sets of requests
for advice:
Installation - I have found someone who does mobile radio installations
professionally, for police and commercial vehicles, and he¹s also a ham.
Plan to meet him next week.  He¹ll have his own list, but I wanted to ask
what my list should be ‹ other than installing the Hustler mount for the
antenna, complete boding of everything to everything, direct DC taken from
the battery (yes or no?), in-line fusing everywhere. . . . DC wiring
shielded?  How about the control lines from the KX3 in the cockpit to the
KPA in the rear cargo space?  Any special considerations?  What else
should I be sure to have done?

SSB  -  I have never used either the KX3 or the K3 on anything other than
CW. I don¹t even know if the Mode switch works.   I saw on the reflector a
couple of weeks ago a ³starter set² of audio settings for the K3.  Anyone
have the equivalent advice for the KX3?  And despite the critique posted
here recently, I have the Heil Pro headset that Elecraft sold with the
rig.  But I don¹t want a headset while I¹m driving, right?  So - what¹s a
good mike?  And should I try to get the KX3 audio output through the car¹s
audio system (it¹s an old Bose), or buy a separate external speaker and
mount it somewhere?  What else am I not thinking of . . ?

Tnx!

Ted, KN1CBR