As I mentioned in another post, back when the first 5.0 engines came out with hydraulic roller lifters, the shop I was working with specialized in the Mustang 5.0, and I converted my "86 Mustang GT to a 5.8 stroker with EFI and mass air in '87. I still have the handheld Crane programmer to monitor the timing and fuel parameters as you drive. I was probably the very first one of those conversions at the time, and I worked with Crane Cams to find a hydraulic roller cam suitable for the 351W conversion in my GT, and they cut 7 camshafts for experimental use and I bought three for the shop and myself. I asked the specialist at Crane Cams if we could run solid roller lifters on those camshafts to try to get them to rev to 7000 or so rpm, and he came back the with answer to set the lash at .004" hot. I still have two of those camshafts running in strokers, one with 14 psi boost after 30 years. One was run with hydraulic roller lifters, and spit out a lifter wheel, but was able to salvage the crank, rods, and block. The camshaft was toast. Joe-JDC