Ok I'll have to wait till I try this tonight or on my days off.
Turns out I do have a real 8910 tach adapter which is just a low pass filter. I just have the ugly older version without the spiffy red plastic casing.
There are 6 wires to hook up with the 6A, 6AL should be the same but don't forget you'll have to clip the wire in the top plug since it's going on a 4 cyl (unless it's already clipped of course). You can download PDF's of the install instructions straight from MSD's website under the download section. The fact that they're old shouldn't worry you, the MSD's are pretty tough and not a whole lot should have changed in their design anyway. Only problem is if the capacitors inside them went south but that's basically impossible to check without cutting it open anyway.
http://www.msdignition.comThe 6 series all have one installation document (except the digital one that's totally different). The diagram you want to use for the MSD in the tracker/kick is the first one that's located at the bottom of "page 10" if you go by the page numbers on the document.
Here's the download link:
http://www.msdignition.com/pdf/6series.pdfIt's 2.2 MB.
Anyway for the 6A, (and presumably the 6AL) the 12 guage red and black go to pos and negative battery red being positive of course. There's a smaller guage orange and black set, those go to + on the coil and - on the coil (orange to pos, black to neg).
The red and white wires connect to the old coil wires. On the 90 tracker, the coil + wire is black with a white stripe, that connects to the red 16 guage wire on the MSD. The coil negative is a brown wire and hooks to the white wire on the MSD.
Now unless you have an 8910 tach adapter this will not work because our ECM needs a tach signal to supply fuel. This is the only direct tie between the fuel injection and ignition on the early models using the 8v, not sure if it changed later but as long as you have a distributor style ignition I doubt it would be any different. Basically the 8910 is installed parallel to the red and white small wires on the MSD via a splice. There's also a diode that connects to the white wire and comes with the 8910 that's recommended to install. Just do a search for 8910 on the MSD webpage to find the installation instructions for the 8910, they only show 2 configurations, haven't got to this point so your guess is as good as mine as to which one is the right one. Make sure you download the regular 8910 document not the 8910 EIS one.
Heck, here's a link to the download even.
http://www.msdignition.com/pdf/8910_tach_adapter.pdfThis one's 285kb or something around there.
I haven't officially got this to work though so it may change slightly when I get it working possibly tonight but probably not till the first part of next week on my days off realistically.
To hook up a blaster 2 coil, replace your stock one with it and hook up the coil pos and coil neg to their respective terminals. I've heard you're not supposed to mount the liquid filled blaster 2's horizontally, but mine has been in my Datsun for 6 years on it's side and hasn't leaked so who knows. I did disconnect the top coil mounting hoop bolt and just have it in there with the bottom one only tilted at a 45 degree angle though. Can't hurt but I don't know if it's necessary. Might want to consider a better set of plug wires too if you're doing the coil and definitely if you do the coil and the MSD.
What I would recommend though is if you're using the blaster coil and want to try the 6A but have the ability to fall back to just the coil in case you have problems with the 6A or can't get it to work and need to drive is to put plain old female spade lugs on the two oem coil pos and coil neg wires. Put male spade lugs on the small red and white wires from the MSD. This way if the MSD fails you can just hook the two original coil wires back to the MSD coil instead of the orange/black wires and be back on the road.
My old wires must have been pretty hosed, I noticed a whole lot less static on the AM radio this morning on my drive to work with the MSD "Superconductor" wires. compared to the NGKs. Then again maybe they were just that crappy to begin with if the fit of the set has any bearing on the overall quality.
Anyway hope that helps. If you've got em laying around it's probably worth a try to hook one up and give it a shot.