DEFINITELY lead flop. good job with collecting your reads, now take advantage of it by realizing he generally only cbets with a strong range. there's no need to check to the PFR when the PFR doesn't cbet light.
as played, we need far too much FE equity (given the awkward amount of stack left behind and the fact that we never win when called) to pull this off profitably. if we're going to bluff, we could do something like a CiB or a raise to 7.00 because most of his b/f'ing range is air anyway.