Expected idle with a Purple Cam

I also have a purple cam in my 360 the 280-474 at first she had a shake hard to tune the fuel mixture in my Holley lol,once I got my timing right she settled down,I think that's were you need to go first timing is everything,what are your spec as for timing.My 360 Idles at 900 and no stalling.Your 340 is build stronger than mine for sure.Different animal but again its timing to tame.