I really recommend the McFarlane cables for throttle and mixture. It is such a pain to have to replace them that it is easily worth the extra cost in saved frustration later. And they are smooooooth!
Checking my build notes for my IO-360-A1A, angle valve horizontal induction with governor on the accessory case, I used 48" for the governor (would have been better to use 49" if I were to do it again), 52.5" for the mixture (it goes to a reversing bell crank mounted to the sump - a Vans system for horizontal induction) and 60" for the throttle (would have been better to be 58" or so if I were to do it again).
Is the IO-360-M1B horizontal induction? If so, these lengths may be about right for you too.
Given the price, you want to be darn sure about the lengths before you order from McFarlane. I think I have my old Van's cables sitting around collecting dust in the hangar. If someone would like to have them to do trial fits to check lengths, I would give them away for just shipping cost.