Another battery truck mount question

Sixty eight dart battery in the trunk three sixty small block street strip car rebuilding from the ground up, Installing a painless 10127 harness kit. I have been a member for quite a while And have read multiple posts on this installation. I am actually following.@crackedback Wiring diagram with the 2 poll master disconnect With a single wire alternator And the alternator contacts On the m. D. are supposed to handle a hundred and twenty five amps, And a Ford solinoid. I know he has a single Pole MD in a drawing that he made with a continuous duty relay. My question is, do I add the CD relay or stay with what I have in the Heavy duty m d. Second question I have a 70 Amp maxi fuse that came with the painless kit. Do I install that closer to the mopar start relay or the master disconnect. One more question, is there any other fuses or breakers? I should install like say alternator wire or battery to Ford sellinoid wire.
Etc
Thanks in advance for the help.
Gary