Why do you want to go with a 1 wire system?
I have not installed a 1 wire system but I did research it and decided to go with a conventional system because I wanted an external regulator.
Yes, you can run the alternator straight to the battery but you should use a fuse or circuit breaker (based on the output of the alternator) between them and use very heavy cable (like #4).
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)