454 faint ticking - problem or normal??

[85raiderburban]

Hello all, I have a carbureted Gen V (1991) 454 with H.O. heads (casting 14097088) in my '80 'Burban. I have had this truck for 5 months and since then its had a faint ticking noise that I cant seem to pin point. It is the same no matter if its 110 degrees (southern NV summer) or 30 degrees outside temperature (winter in northern AZ high elevation). At light throttle its the same. Anything above mid throttle it gets louder. I have checked my exhaust (headers into cat-less H-pipe) and found no leaks whatsoever. I am thinking maybe the lifters or the valves. Not entirely sure as this is the first Chevy engine Ive owned that ticks like this. The link below is to a short video I shot last night (with my Galaxy S4) so you can get an idea of what Im hearing.

https://vid.me/j1F2


Any ideas would be greatly appreciated. Thanks again.