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My 97 head is ticking like an alarm clock, build me your ultimate head. If I am rebuilding my head I am doing it one time and doing it right.
After dyno time and all, I think it came to well over $10k for that motor. I'm sure it's worth it everytime that engine fires up, howeverYou can add a ton of trq w. some head!
There's some old timer on m.net that built a ~$8k miata motor IIRC.
It would be 20 when cold. The first number and the "w" go together, with the letter meaning "winter," not "weight" like most people think. In summer it would be 50.