Back in the '70's, I used to do a conversion on the 788 trigger wherein I installed adjustment screws for sear engagement, weight of pull, and overtravel. It worked out fine but I suspect the Timney replacement would be a better option.
With just a few changes, the 788 could have been a much better rifle. As it was, it was a cheap rifle which worked surprisingly well. The action for rimmed cartridges was unique for the time. GD