86gt stock block> with current set up> 65mmtb, 89 upper I/T,pullies, flows,msd ign,3.73,s, stock heads,> made 201rwhp/283rwtrq ]will be adding> cobra I/T, ported&polished E6,s with spring kit, better headers,magnum 1.6 RR. I,m guessing between 240-250rwhp. I might mill the new heads .020.
Around there, maybe a little less. E6's don't flow very much even when ported polished because they have a terrible combustion chamber design. You will notice a gain though, but don't expect anything huge.