Does it have and old school distributor style ignition or is it coil on plug? If you have ignitions wires just keep copper plugs in the engine because it does you 0 favors to buy expensive spark plugs. NGK or Denso are the brands you wanna go with. A custom exhaust is always a fun way to help the engine breath.
I'm not 100% certain about the remap but that is highly likely. Your best bet is to go with a piggy back like a mega squirt system. If you can find a cold air intake for it then try it out or even make your own
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