Thanks for looking and for any advice you have to offer. I have just gotten a valve job and was pre-assembly when I got to thinking about the valve adjustements. I think I have solid lifters...not sure 100%. From the outside, it looks like what you would see in a hydraulic lifter, but when you take the retainer ring out and dissassemble it there is no spring or ball valve or anything like that. Just a small cup and a disk with a hole in it. Is this what a standard solid lifter looks like? I have never had one before. Anyway, this engine is not stock and I did not build it and I have no idea what cam it has or what the back lash should be. Any ideas on where to start and how to adjust the valves. Engine is a 1960 283 from a vette with the 290 HP FI option...unknown cam and I have 327 double hump heads on it, Any advice is very welcome and thanks again.