I have a 20 yr old Melling catalog for FE's their stock replacement part #'s are SYB-6,8,13, 22 or 23. Only the SYB-6 is mech.
For performance cams, all listed are hyd and they are 5 digit's, all starting with 24, i.e. 24302, their hotest cam and a 24104, also listed as MTF-4. None have a suffix. Also none list a .300 cam lift. .295 x .31 and a .320 for their 24302 cam.
I was surprised that they didn't list any of the Ford FE mech lifter profiles as they did list a SB LeMans cam.
TRW's cams, '78 - '89, have part #'s of TM or TP and 3 digits, no suffix's. TP are performance cams and have several Ford profiles.
Elgin's current catalog #'s have a E prefix and a P suffix, 3 and 4 digit's, in between but, no 1027