The best way is to bend them 'side-by-side' where the single was, going into the mufflers in the stock position.
From there; go back till your past the rear axle & aim them out & down.
If you want one on each side, do that to the rear of the axle so their not in the way when you do driveline work etc.
Patrick's has a "2 in 2 out" single muffler that's stainless steel that many like. Avoid the 'equalizer' pipe/tube. Use at least 28" "glasspacks" if you don't like his.
There's lots to choose from (mufflers) also.
Good luck.
