I am on my third 5.4 engine and trans also from SL55, crossfire V8 #1 ran 10.5 @ 132 (no time slip)
have time slip for 10.79 @ 130
crossfire V8 #2 ran 10.92@ 128
and crossfire #3 have not finished yet and has not taken to the track yet expect hope low 10's
the SL55 engine starts at 485 hp at the crank , that is 135 hp more than a stock srt6
when i get through it will have 600 hp or very close to it ,,, can you say sleeper, or street genius.
jim