think daves just needed the head gasket done and that was it, think reyland still has it with his zr, always exited by what reyland does as its properly exiting stuff done well, reyland and ade at aa autosport(do more zr creations)
i think if you are going to be chasing power then you need to change the engine to something else more tunable, there is hardly anything about for the kv6 more than anything so any small thing ends up costing a fortune compared to another engine where performance parts are on the shelf more readily,
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