I did have this discusion with comp cams. They told me that on the street solid roller lifters that the roller needle bearings and roller mechanism are the same on the hydraulic and solid roller lifters. The difference is the hydraulic piddle valve and spring. If you check on comp cams web site they show the same springs for either the solid or hydraulic roller cam in the grind specs that I am running. Their tech department told me that my valve train is good for 6,500 RPM with hydraulic lifters and 7,500 with solid lifters and a revkit. A revkit cannot be installed with hydraulic lifters on a BB Ford with hydraulic roller lifters for some reason. Comp cams tech department told me that they have some street roller cams with 40,000 miles on them with solid roller lifters. They do recommend that you check valve spring pressure every two seasons, and that you change them as needed. These lifters are easy to rebuild by yourself. All you need is a bench vise. I plan on changing springs and rebuilding the lifters every two to three years depending on usage. This car is not my daily driver! This is a MILD roller cam not a Nascar/ Grand National cam. A racing cam will not last in a street car regardless of what lifters are in the engine. If you read the information on that web site they dis on all roller lifters. They are trying to sell a product to replace roller lifters in RACE engines not street engines. I would'nt buy their product either.
I need something to do during the long winters anyway
I don't mind changing lifters and springs.