Perhaps OP has misunderstood what historical present (also called dramatic present or narrative present) means. It actually refers to using the present tense when narrating past events - as, for example...
So I'm in the pub the other day, and this guy comes up to me and says [blah blah]...
Note that (as in my example) this usage is particularly associated with casual / dialectal / non-standard speech, but can also occur in highly-polished literary contexts too (adding "immediacy").
The specific cited example is clumsily-constructed though. The initial adverbial element dating back when would be completely unacceptable to the vast majority of native speakers. It means [ever] since - which feasibly could be validly written as dating back to when, but personally I'd much prefer back from when).
There's also confusion regarding whether the word dating should be there at all. Whether or not it's present significantly affects the meaning (with = #1 below, without = #2).
Discarding irrelevant details and simplifying things, the two most obvious possible meanings are...
1: Ever since I was a child I have wanted my Dad to buy me a Gameboy.
2: Back when I was a child I wanted my Dad to buy me a Gameboy.
(Note that in both cases, always could reasonably be included before wanted.)
Turning to OP's specific adverbial clause telling to my dad [what I told him], this would more naturally be phrased as saying to my Dad. It could feasibly be added before the period in both my two shortened versions above. With #1, it specifies what I have always done [and am still doing], whereas with #2 it's something I did (in the past, but not now).
I don't know which exact meaning (#1 / #2 above, or something completely different) OP intends, so it's not really worth me trying to rephrase it to a more "natural" form. But it doesn't have much to do with "historical present" as a grammatical concept. OP's cited example is just a continuous form (telling) in an optional adverbial clause. No different to, say,...
He walked/walks/will walk home, thinking deep thoughts
...where obviously the "continuous" adverbial thinking clause applies to past, present, or future action.