I haven't dyno-ed it. Others that have the same truck and mods tuned by the same tuner that have dyno-ed are around 580ish whp and 610ish lbs peak. Considering that its rated at 450 SAE hp (maybe 350 whp) stock, its a huge difference. I assume I am over 700bhp based on approx 20% drivetrain loss. I am also running E50 fuel but have a slightly less aggressive although still solid 93 tune that I can use when needed (ie no E85 available to mix in). I wouldn't push it further on stock internals. Other than some fine tuning with the E50, project is complete.
Nice looking truck. I like the color. Did you supercharge it?
I had a silvy SS that was as quick, but didn't have the top end power. It was supercharged with a little NOS mixed in. I recall a high 4.3 0-60 with that truck. That was my first foray into stupid fast trucks and I did the work myself except the final tuning despite not knowing anything about engines when I started. Not sure how I didn't blow it up! I will try to toss up a photo later.