Safe to put in Mercon V in A833?

HI I drove my other 340 833 every day for 30,000 miles some times on 5 hour trips and never had a problem with atf . I did this because when i was in my 20s this was my every day driver . I found this info in a mopar direct connection book and i do the same with my 1970 340 833 today . This car is only used about 2,000 miles a year never had any trouble . I use the new syncr atf