Yea, just get it back to stock form, and working correctly. It helps create more low end torque. If you can "feel" a boost in power around 4k rpms, then the system isn't working properly...
I was looking through the TSRM, and found this:
http://www.cygnusx1.net/Supra/Library/EPC/291410/catalog.aspx?Figure=8601&Page=1
It appears to be a cd player for the pre-89 Supras...I thought this was kinda interesting, maybe it was an option? IIRC, weren' the newer stock cd players in...
Yea, the Bosch are terrible, get those out ASAP.
I would go with stock Denso's or NGK's...some will say Autolite Coppers are a good plug too, but I have no experience with those, so I won't comment.
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