And it's interesting to hear the comments about the 340 cam in a Teen. Some say you need a convertor and some say you don't. A higher stall convertor should help especially if you are having issues getting it to idle slow enough for gear changes from park to reverse and drive.
As you know, a good convertor always helps. I've run the 340 cam in a 318 with a stock convertor. The cam still helped for sure, but maybe not felt from 0-30 mph.