Lifter tic

I have a 360 in my Barracuda that has a lifter that started ticking. The motor has about 3500 miles on it now. I has a Comp cam that was ground close to the 68 340 4spd spec, with comp cam lifters. Ticking started last weekend, I changed the oil to 5w 50 synthetic this week and is still ticking. Has anyone had any problems with comp lifters? Car still runs good I just don't like the ticking.