Most accurate radiator hoses?

[Ls6 Ragtop]

Don't know if he's corrected them but the hose markings Pace Car Jeff was using is unlike any original GM 70 Chevelle BB radiator hose I've ever seen. Do you need a 3942453 SV upper or a 3917227 KY upper? All BB Chevelles use a 3959188 SZ lower. When I asked Jeff where he got his sample from he produced an example of a totally different application than these 3 numbers I've listed as his reference. I'm not intending this to sound like a vendor bashing but if you advertise exact reproduction anything, I feel you better do your homework before making that claim. There are more accurate stamped hoses available for 1970 BB Chevelle applications, feel free to pm me for more info.
Chris