Thanks for the input Earl, appreciate it.
2 - test periods. It did create problems for you. Maybe the filters help us. Anyway, interesting to know what you ran into.
Ya, 26L isn't 6 or 8 ET but most us like the maintaining & self lapping features. Although there is not quite the flexability as with the older valves. But as with everything, there are trade offs, plus the fact, the std. ga. power may have a tad more backhead space to work with.
Yes, we did the testing on the engine routine also. But as you say, FRA has chnaged their tune.
Regards,
Chris