MSD ignition install

[deaths circus]

i got a MSD 6al2 igntion box pro billet (non vaccuum) distributor and a blaster 2 coil i want to install in my 73 challenger with a 440 it has a mopar orange box and distributor in it now and want to get rid of it searched but couldn't find any good write ups on it anyone have a good one with pics i can use as a reference or can anyone give me a rundown on how you's wired in your msd ignition into the facory wiring harness

[Chryco Psycho]

Welcome
 There is a pigtail included in the parts with the MSD , it will plug into the blue & brown wire at the ballast resister on the firewall , connect this to the small red trigger wire on the MSD unit , the 2 larger cable [red& black ] go to the battery , the rest of the wires connect to the dist & coil

[deaths circus]

thanks for the welcome i been a member on dodgecharger.com for years and would read up some on this site but just now became a member usually asked any questions i have on my challenger over there back to the ignition i don't know to much about ignition and carb adjusting yet so ill need some help through this install can you use the mopar orange box with a msd pro billet 8546 distributor? and a 6al2 box with mopar dist? having some trouble with my engine it idles fine but any quick throttle motion it cuts out for a second then gains RPM and off idle until around 3,000 it sputters possible miss? then 3 to around 4500 its fine and after that it falls on its face sputtering or missing motor ran fine for all last year until right by winter it started doing this replaced plugs coil cleaned inside distributor cap and rotor messed with the timing some and carb no difference also i had a holley fuel lean rich indicator prong go's inside exhaust pipe  has 3 lights lean normal and rich was always reading normal until it started this problem then started saying lean when idling and went to normal when you started cruising now it always reads lean i did have a holley 750 on it just switched to a proform 750 dp manual secondarys it made no difference with the cutting out but i can tell this is a great carb motor feels like it likes it and if it ran right i would be able to tell the difference noticably ive heard of to many people having there mopar boxs fail and cause similar problems and this is the next thing to replace hoping it isn't internal motor is a pretty much stock 71 440 6 pack internals with hooker headers and mopar ign here's my setup

[dodj]

I know the mopar dist will work with a 6A. I think the l is just for limiter so I think it will work fine. However, regarding your ballast resistor, the blue wire with the cracked insulation exposing a bare wire is your 12vdc ignition feed from the ign sw. You should make sure the wire isn't corroded and insulate it. Tape it/ replace it or whatever. 

[Chryco Psycho]

Have you checked the gap between the reluctor & pick up inside the dist ?, it should be .008 .
 The pick up in the dist could be bad as well
 yes you can use the Mopar dist with the MSD or the other way around as well using the Orange box & MSD dist . What plugs & gap are you using ?

[deaths circus]

i took notice to the blue insulated wire being cracked was planning on fixing it while i did this swap no i haven't checked the gap in the dist anyone have a pic they can post to show how you do this? im using ngk xr5 plugs with .035 gap

[deaths circus]

When installing the MSD ignition box wouldnt you bypass the ballast resistor? Which pigtail would I use from the kit?

[Chryco Psycho]

yes you no longer use the ballast with MSD
 there should be a twin feamle spade to plug into the blue & brown wire at the ballast , that will connect to the small red trigger wire on the MSD

[deaths circus]

So I would unplug the blue wire with the jumper wire going to the bottom terminal on the ballast and connect it to 1 spade terminal and hook the other spade terminal from the included pigtail to the plug on the ballast that has the brown and black wires coming from it?

[Chryco Psycho]

Yes , the brown wire feeds power while cranking the engine , the black wire continues to the coil so it has 12v while starting
 if the MSD is not connected to the the brown wire you will have no power while cranking so it will not start .

[deaths circus]

thanks I'll give that a try and see if that works when hooking up the distributor I've seen a lot of people talking about using a bronze gear should I get one of these while its out? Wheres the best quality places to get one at?

[Chryco Psycho]

the Only reason to use a Bronze drive gear is if you are running a billet roller cam , if the cam is a std iron one the stock drive is just fine

[deaths circus]

I plan on running a comp cam solid flat tappet in the near future the  iron one should be good as long as I don't use a roller cam?

[dodj]

What does a bronze gear do for you? 

[deaths circus]

Today I started untaping the engine wiring harness so I can replace some of the bad parts in it more I uncovered the worse it got. The previous owner did a real hack job every single wire from the bulkhead was  cut and spliced at one point spots are burned and taped over I've never seen every wire mostly just acouple splices so I'm just going to get a new harness where should I go to get my harness I got yearones for my charger and it looks nice but haven't installed yet how's rosevelle moparts any one better quality then the other if I can I'd like to get  a engine harness for a 73 challenger with 440 and electronic ignition YO has electronic ignition ones for other years but not 73 or do I just have to tap into the new harness