If I remember correctly both 332 and 352 were called "Interceptors" and 292" Y-blocks were still "Thunderbird Special" Early models used solid lifters/cam, machined combustion chamber with about 10 to 1 c/r [rated] The actual c/r was dependent on manufacture tolerances and could vary up to one full point when stacking all the tolerances. Early customer complaints was the inability to run on available pump gas with out pinging and having to adjust the valves as part of the scheduled maintenance. As a results the factory lowered the c/r to about 9.6 to 1, drilled the block for hyd lifters and install said lifters. Only difference between the 332 and the 352 is the stroke [332=3.30" 352=3.50"] Early FE cylinder [EDC] heads had a machined chamber with a volume of 69-72 cc, Some had a core plug at each end of the head, later "575" heads had cast chambers, no end core plugs and slightly bigger combustion chamber 70-73cc. Almost all info here is from memory so take with a grain of salt.