Yeah, the HP number isnāt high because it was 110 degrees in the Dyno room.
388 lb/ft torque, more than my 69ā SS-396 Chevelle...Yours should be higher with your Mods...
Regards
Did you do that video with the window down and what are you recording with? All I have is this crappy iPad. Yes, another resonator might help...I kinda like the pitch of yours as is! So the tune sounds great !
Regards