MSD Ignition was created in 1970.
You can replace the coil with an MSD coil when using an MSD ignition, but you don't have to.Cure for what? Depends on the problems you were having before. MSD is generally more complicated than stock ignition. I mean it ads more steps between bat/alt and spark, so there is more to fail if anything fails; though they are generally reliable. But it depends on the initial problems. If the problem was low voltage to the ignition coil, slapping an MSD ignition box in between won't work either because it uses the same wire input (which would still be too low if that was never fixed).If the only problem was the coil or distributor, then yea swapping it for MSD coil and distributor will fix it, but you might as well just replace them with stock parts and forget about the MSD ignition box, unless you want the added performance. In that instance it wouldn't be a cure per say. I mean it will fix the problem, but not because it's MSD, but just because you replaced the faulty parts.http://www.nls.net/mp/volks/htm/spark.htmfor the MSD 6 series:http://www.msdignition.com/pdf/6%20series/6series.pdf
8 degrees BTDC.
Yes, an interlock device will still work. An MSD box is an after market brain that fires the spark plugs in performance vehicles and has nothing to do with engaging the starter motor. The interlock device is installed between the ignition switch (key) and the starter motor relay or solenoid and is independent of the secondary ignition system. (Where the MSD box is located)
.040 to .045 should work well.
Mallory ignition or MSD ignition are the best bang for your buck. Personally i have used mallory unilite and have excellent results.
When you go with an aftermarket ignition system, you should follow the recommendations of the manufacturer. MSD is a business that is well known for helping people use their products correctly. They have a website and a telephone tech line ready to serve you. If you just need to get it running until you can contact MSD, set the plug gap at .035". That's close enough.
Chevrolet 350s are REAL easy to upgrade to electronic ignition because there are so many of them, there's a vast number of aftermarket parts available. The easiest way is to buy an MSD Ready to Run distributor, install it and be happy. You can plug an MSD 6A box into it, but you don't have to.
2 tips- an msd ignition and a trans with overdrive if you don't already have one.
msd
There should be a tach output connection on the side of the box somewhere, you just plug your tach pickup into that. If it doesn't work you'll need a MSD tach adapter. I'm unsure of the part numbers but there are 2 different ones, it depends on what you used to wire in your ignition. If you used the white wire there is one and if you used a magnetic pickup ( green and violet wires ) there is another one....MSD-8920. I have a sunpro tach and I had to go out and buy an adapter to make it work...for about 50 bucks.
It is simple....as long as you have the right one.....on my 350 the ignition coil was located inside the distributer cap, easy enough, you just take off the 2 bolts and unplug