View Full Version : Correct Distributor and Coil?
10-27-2010, 06:55 PM
Bought a 87 Prostar with the 351. It was missing the distributor and coil when we purchased it, and are looking for the correct match to put back in. See pic below
I'm about to order theses two, but wanted to see if they would work correctly? Is there a better setup? Anything I should be looking for? Thanks for the help.
10-27-2010, 10:28 PM
That distributor will work well. It gives a lot of flexibility in adjustment of your advance curve. I put one in but as I recall, you need to use a resistor coil or external resistor......check for the resistance needed.
If the coil you use is oil filled, you'll need to change the mounting bracket so it holds the coil in a vertical position rather than horizontally as the bracket is sitting in the photo. An oil filled coil sitting the way the bracket is now will overheat in a fairly short period of time (from experience, about 20 minutes before it overheats and fails)
10-27-2010, 10:48 PM
Will confirm previous post on both accounts. I used nearly the exact setup and had problems with the coil overheating during long idle periods.
Mallory does make another coil that does not need the ballast resistor, but if your resistor is there you might as well stick with the one you selected, otherwise you will need to do some rewiring to bypass the resistor. Be sure you either have the ballast resistor or the special coil, otherwise you will blow the distributor module.
If you want to save a $, I believe Amazon has that coil less expensive with free shipping. Also, there was a guy selling that distributor on ebay for about half price. He had bought a bunch of warranty returns from mallory and fixed them (almost always just need a new module from somebody who hooked it up wrong). I bought one of his and have been pleased.
10-28-2010, 01:02 PM
Shot an email over to Mallory also reguarding the set-up I was planning on using. They said I have 2 options like you guys have also said.
I can either use the set-up I have laid out and add a ballast resistor, or use the following coil:
My question with this is where can I mount this thing? It says to mount as close to the distributor as possible but away from engine heat and not on the engine.
Any suggestions or should I just go with the original layout and add the resistor?
10-28-2010, 05:42 PM
10-28-2010, 06:16 PM
For the sake of comparison in prices:
You can mount the OEM type coil (in the above link) right on the engine block, as are most all of the OEMs.
SkiDIM is sometimes a bit higher on prices, but their service and guarantees are superb. That is worth a lot to me.
This isn't the high output coil that you want to use with an electronic ignition to take advantage of the hotter spark.