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Looking for thoughts on how long to run engine before I think about bearing, rings etc to be checked, replaced. 600 hp na engine in 5000 lb truck. Sees a lot of street, offroad time. Dirt drag, mud races a couple times a year. Spin it to 6200. 521 stroker. Probably 3-4 k miles a year. How about valve spring check. Just looking for someone with experience on maintenance on something like this. Rather not wait until I hear noises or loose oil pressure. Be nice to catch it before it goes. Maybe even before it needs a new bore. Thanks guys.
 
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