5.9 Magnum Torque motor build?

NM that dyno was for a AMC 343 stroked to around 360 (4.090 bore x 390 steel crank stroke if I remember correctly
I do not remember if he has the older square port heads (which did not flow well) or the later "dog leg" which do (better than stock chevy and mopar)
That curve is similar to what I found for my 440 Motorhome Motor (ported 915 closed chamber heads with stock Motor home valves with the Inconel exhaust (left some HP on the table) true 9:1 compression with .030 quench. I've also used this grind in 360 LA
It does pull without bucking down at stall (with low stall RV converter) and revs to 6K but with that torque curve you do not have to rev "past the HP curve" to still have hp after a shift- it really does not care much- but when you do rev to 6000 you drop down to around 4000 where, as you can see, you are still pulling strong
hate to loose momentum with the motorhome on a hill
The collector length is frequently overlooked and most are too big