410 LA small block will not rev past 6000
* Edit 5252 rpm don't happen at 88 mph cause hp and tq are scaled different on this graph so this is all wrong.
In 3rd gear with 3.91 I get a 29.5" tire @ 88 mph (zoomed in about 88 = 5252 rpm)
113 x 5.24 x 336 / 29.5" = 6744 rpm
Unless I'm totally wrong about something that dyno graph is showing your pulling past 6000 rpms.
*Edit, even if I take gears and tires out of the equation, (113 mph / 88 mph) 5252 = 6744 rpms.