Flat tappet to solid roller...

IMO, not really, no. IF you decide to run it as a 2X4, then maybe. I say maybe because of the cost and headache factor in set up. However, I'll never say never to dual quads. Tunnel ram or low level dual plane. But it is expensive and troublesome to set up in the beginning.
Once sorted out & operating well, you'll forget a out the cost.

OK so if 2x4 then what cfm? I have one 600cfm double pumper, should I get another one? :-)
Actually used 600cfm dp is not that hard to get here in 200$ range.
Lots of Chevy guys here so there are some "universal" stuff.

What do you mean by expensive and hard to setup? Problem is that I would probably need to learn as I go cause there is nobody to do it for me here. On the plus side I'd learn some good stuff so why not? Would be good fun I guess...

We will see but it is possible that I will postpone tunnel ram idea to late summer next year. Would be best to gather all the parts. After all swapping intake is no big deal, but it is VERY tempting to go this way so all advice is more then welcome.

And yea, expensive.... Like anything is cheap with this hobby ;-)