6 Pack vs. 650 4BBL?

Hi Guys,

I would like to update the 74- 413 390 HP dart, with 3:55 gears and all conversion hardware.
I use a 600 Eddy.
What 4 bbl would satisfy this RB for mo" HP.
I think maybe 2X4 setup. would a 780 satisfy the urge. I am installing dual snorkel scoop,
to fit 14" or 2x4 cleaner.

Thanks, ddume in VA,


there again it all depends on what cam, cr, type of driving, max rpm, and so on.
the more info the better