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Proform BB1000 Valve Spring Tester Rimac Big Blue with a 0-1000 lbs/in. range. Also referenced in the description are Proform 141-262 engine valve covers for GM LS and Proform 66878 roller rocker arm set with 1.7 ratio and 5/16 stud fitment for Ford 302HO/351W. Location: unknown.