I replaced my valve cover studs with 1/4-20 stainless socket head cap screws. I run solids and can remove my valve covers without loosening my exhaust using looong ball end 3/16" Allen wrenches.For reference; Stainless Marine manifolds and CMI E-Top headers. I do have to take the V-clamps off the tails.

I ran solid Ultradyne cams for 6 or 7 yrs ('06-'12 or '13) max 6500RPM Comp 943 springs 0.022" lash. I would check lash at the start of every summer or any abnormal tick, never a problem. I run Isky Red Zone lifters that have been rebuilt once. In '13 I installed Cam Motion HR cams and still run my solid Isky Red Zones. I run Comp 933 springs 0.007" lash 5500RPM. I had issues with my valve train on one head cylinder 1 and 3 intakes. I did change out 2 of my Scorpion rockers on those two cylinders with 2 other Scorpion rockers. (I didn't like the feel of them and the had a noise) Both were 1.8 ratio but 2 different models. I did not check the push rod to head clearance with the 2 new rockers. (I assumed they were the same) The push rods had the slightest contact with the head and I assume were deflecting a little. I clearanced the head and got thicker push rods to solve that issue. Now every time I check lash it's just checking it. No adjustments. Might not be exactly your situation and I'll get flamed in a minute or 2 for running solids on HR's lol but it's all good. Hours?? I probably have 250 hrs on a set of Isky rebuilds and 250 hrs on the 943's and 150+ on the 933's, 12yrs or so combined. I just rebuilt my bottom ends and switched blocks last spring, but reused all of my valve train components.