Do I need to retain my voltage regulator despite changing my ignition system to msd, and will be changing out my alternator to a 150 amp model? New wiring harness is being used.

 

Depends on what kind of alternator your running. You better bypass your amp gauge cause those kind of amps will burn it up.

 

The above. Depends on whether you buy, say, an aftermarket alternator with a built in (integral) regulator. ALL alternators use regulators, it's just that some are built in. On late model Mopars they are built into the engine computer (EFI)

Also, what makes you think you need a 150A alternator?

Please read this article:

on the problems with original wiring harnesses, ammeters, and bulkhead connectors

http://www.madelectrical.com/electri...p-gauges.shtml

 

I am running many electric accessories including a sound system. Electric water pump, cooling fan, electric tranny cooler with fan, dual fuel pumps, lights, interior power sources, gauges, etc. how big should I go? I just want to be sure that I am not going to have a dead battery when I get to where I'm going.

 

How do I wore in my aftermarket ammeter?

 

i think chrysler used 2-3 different AMP meters over the years. i think its best to go to a volt meter. seems that all car makers use volt meters. and seam to do the job fine. when it was cold this winter my volt meter seamed to make the bat volt a little higher you cant see that on an AMP meter.

 

So with a voltmeter I don't have to worry about anything with using a 150 amp alternator?

 

the factory wiring cant handle 150 amps. you need to use relays to power hi draw items directly from the battery

 

PLEASE read the link I provided earlier....................