8v71 rpm

[HB of CJ]

My two cents worth.  About 2100 rpm maximum continuous.  About 2500 through the gears max.  What kind of tranny do you have?  Sometimes the converter will feel and sound like another gear.  You could have a 4 speed and it MIGHT feel like a 6 speed.  Also the same with a 5 speed.  Your top speed implies a direct high gear.

Drive accessories come to mind.  Some big cooling fans, alternators, power steering pumps, A/C compressors, etc., do not like high rpm and may quickly fail.  Belts can be thrown.  Only the 53 series Detroit liked 2800 rpm, the turbo versions even less.  I guess the first thing is to confirm what exactly you have and how accurate the tack is.

HB of CJ (old coot) Hope this helps.  I have been bus less for years now, but still LOVE this forum.  Just me.  Welcome to the fun and madness.  No known cure.