Could I take my cylinder heads out of my 93 Del Sol and get it shaved down to get better compression, or should I buy performance heads?
In the long run, you'll be better off with a performance head. Then you'll need performance injectors, ignition and cam. It can get pricier.
It really depends on how deep your pockets are.
Unless you are ready to buy a high-po engine and line the engine bay with chrome, like so many others have done, just leave the head stock and get different pistons for higher compression
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