a zs engine with 120k is still very usable, I would be surprised if you noticed any difference to one with 80k. With the money saved you can invest in other things that would be usable for track as well as maintenance.
Somebody supercharged a ZS 180 at 130k and it went fine.
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Last edited by Supercharged_Z; 01-07-13 at 08:03 PM.
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