Parker hales are m98 and the timney triggers made for them work well.
However mine was not a drop in install - I found that the featherweight deluxe's safety lever sits too high and interferes with cycling the bolt - I had to cut the thumb tab and re-weld it lower. Also, the trigger housing body is wide and sits so low in the stock that in hits the bottom metal/trigger guard - I had to relieve about a 1/16" of metal on my mill to make it work.
Depending what you are upgrading from, your best bet would be to find a Parker hale adjustable trigger - may not be as crisp as the Timney but certainly easier to install and has just as many features.
