410 LA small block will not rev past 6000

PRH said

Regardless of what the graph “looks like”, HP & TQ are always equal at 5252 RPM.

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True and also every Rpm hp % of torque is fixed eg.. Hp is 50% of tq @ 2626 rpm, hp is 150% of tq @ 7878 rpm etc.. Basically 19% per 1000 rpms.