371 build W/Big Mouth heads

Forgot to mention another example. Had a 71 Duster, i just sold this spring. Had it ultra sorted out.
The motor was actually pretty famous.... lol....you can see the build by googling " La Confidential Mopar"
It was an enginemasters motor that made 477 at the competition. I actually bought the dyno carb they ran it with and am in fact using it currently.
Last outing last fall we pulled all the belts off it and pushed it to the line, trying for an all time best( had the car 4 years) It went 114 with a 904 and the convertor was perfect. Trick little motor. Unless the enginemasters dyno was off 75-100 horse????