The Mallory Series 47 is designed to replace points ignition, isn't it?

Stock voltage doesn't mean anything if you don't have a stock ignition system.

The Instructions for your Unilite are very clear on how much resistance it needs (Mallory provides a part number for a resistor), and they also recommend a specific "power filter" part number, in the event you are having problems getting a clean signal/good drivability. I will also suspect you probably do not want to have BOTH a ballast resistor and a resistance wire. BUT this depends entirely on how much resistance the 2 parts provide when put in series, compared to the amount of resistance/voltage your Unilite distributor requires to function properly. So why not just take ohm reading on your current resistance setup (with both ballast and wire in-line) and compare with the resistance spec for the recommended Mallory ballast resistor to see how close you are? Or contact Mallory's tech support to see if your ohm reading meets their specs for that distributor? I would strongly advise this before going any further. Having incorrect resistance on this circuit could burn up your expensive distributor (this warning is also clearly written on the Mallory Unilite 47's instruction sheet). Hopefully it is not already damaged. I do not recommend you just guess on this and continue to "try things." Take a resistance reading of what you have, and compare with the needed Mallory spec. Make them match before you start the car again.

As for your MSD coil positioning, again I think you should simply refer to MSD's instructions instead of that link you found. That link is for proper positioning of factory coil. You don't have a factory coil. Per MSD, the recommended mounting position for Blaster 2's depends on specific MSD part number. For example I clipped this quote from an MSD Blaster 2 instruction sheet:

"It is recommended to mount the PN 8202 and 8223 coils in an upright position. The High Vibration Coil, PN 8222, can be mounted in any position due to its epoxy potting compound."

Just FYI non-epoxy MSD coils are simply filled with oil...not exactly "toxic chemicals" but I probably wouldn't suggest drinking it LOL...

MSD also offers quality tech support if you contact them.

And Accel 8.8 wires come in many different forms, you don't say which type you have. Some will work with your Mallory distributor...but not their solid core 8.8's. But if you have the solid core version, they are specifically recommended against, by Mallory, and may be causing your problem.

You should also probably research plug gap requirements for your setup. Stock gap may, or may not, be ideal for what you have.

Since you have multiple different product brands spliced together creating your current ignition system, with almost nothing stock, it is positively critical that you read each product's instruction sheet very carefully, and make absolutely certain each is compatible with the other when installed together. Best case scenario, a mismatch combo doesn't run right...worst case scenario, you will damage/destroy some of the parts.