The primary objective of the EPA/Ford Ceramic Regenerator Design and Durability Program is to develop ceramic regenerator cores that can be used in passenger car gas turbine engines, Stirling Cycle engines, and industrial/truck gas turbine engines. Specific durability objectives are defined as achieving a B sub 10 life of 10,000 hours on a truck/industrial gas turbine engine duty cycle. Operating experience, laboratory analysis, and mathematical analysis accumulated on the lithium-alumina-silicate (LAS) ceramic regenerator cores through the end of 1973 were previously reported. The test and analytical results acquired during 1974 are given, including descriptions of the material testing conducted magnesium-alumina-silicate (MAS) regenerator samples, analysis of core and rim designs, development of new regenerator core drive and support systems, and the results of over 18,000 hours of engine durability testing accumulated during 1974. (ERA citation 01:026020)