Heres a little spreadsheet I developed couple years ago when exploring same question. Id like to thank Mike Barry, Andrew Moore and Sutherland's for the help puttng this together.
Mafac Center Pull Dimensions
Model # Top slot mid slot bot slot Competition Cn0A 39 44 49 Cn1A 44 49 54 Cn2A 49 54 59 Cn3A 51 58.5 66 GT GT0A 38 43 48 GT1A 43 48 53 GT2A 48 53 58 2000 M0A 43 50.5 58 M1A 48 55.5 63 M2A 53 60.5 68 M3A 55 65 75 Racer R0 43 50.5 58 R1 48 55.5 63 R2 53 60.5 68 R3 55 65 75 S S0 44 51.5 59 S1 49 56.5 64 S2 54 61.5 69 S3 56 66 76 Raid Rd 65 72.5 80
Tom Rawson
Oakland, CA