340 Cam Compatability

What is duration at .050"?
I ran the MP 284/484 cam with 3.23 gears installed at 108 degrees in a 340.
This is the recommended cam for an auto,so since I figured it would make a
little low end,it was used with a 4-spd.This cam has more duration so if you
are using a stock 340 convertor,I'd think you'd be okay.You can always degree
it go move the power down a little bit.Be sure to use a dual plane intake,the
single plane I tried didn't start the power till 3500 with that cam.Bob