headers for a 559ci

Hi,
I have a 559ci with scj heads, comp cam .726/.692 lift and 276/280 duration@.050 and a rons terminator that makes 800hp.
Right now I have 2 1/8 headers, do you recommend going to 2 1/4?
When it was tested at the dyno it made 801hp@6100 and 786tq@4700 with 2 1/4 chevrolet headers with an adapter.