This tranny is in a Z/28. Tranny has been rebuilt. The car shifts late at WOT. The car is hitting the rev-limiter @7000 Car is modified with heads/cam, long-tube headers, etc. It made @420hp on the dyno but has lost @50hp since the last dyno session. What should the line pressure read? The tranny shop said the line pressure was fine Any help would be greatly appreciated.