any dyno sheet should show that at 5650 rpm the hp and torque cross on the sheet if they dont they dyno's info are bogus and the fuel is at 100 oct with torco leaded booster at that mix
used to run that combo on my american offshore it made 890 hp at 6000 rpm and 850 ft of torque with a flat torque curve it was a good combo we ran 8 psi boost twim 900 cfm carbs non intercooled 32 deg timing 14 deg curve all in at 2500 rpm
a 4l60 is computer controlled and doesnt have a detent cable its nothing more than a 700r4 without the cable a 4l80e is a bigger trans but they arent as good as you think we have 2 tows trucks that have 4l80's and im not impressed stick with the 4l60 but you must keep it cool to live add a...