470 going to the dyno - HP/TQ estimates

The engine is going to make great torque guaranteed.
Im kinda basing the number off of my 1st build that didn't last through the Dyno session.
( No fault of mine or Dyno operator)
I had untouched tf240 heads, untouched track heat intake, a single 850 annular booster carbs, 2 inch fenderwell headers and a solid flat tappet cam 260-264 at .050 and 11.6 compression.
If I remember correctly it made 610 at 5300-5400 rpm. But 600 ft lbs from 3k up to 4400.
It never went under 500 ft lbs through the tests up to 6300.
My new 470 is making 685-690 ish, but there's been alot of changes.
Please take some videos too.
I'm trying to get my car ready to be my engines home but I'll live through you until that happens lol .
I think your heads are going to make the difference. I was running out of air
Thanks for the info....Sorry to hear your 1st build didn't make it through the Dyno session. If I might ask, what was the failure?

I'll make sure to take some videos and will try to post them but I'm not real familiar with this site and not sure if I can attach videos like I did with the photos.

I tore the car down 3 years ago and should have it on the road on the spring. (Always takes longer than I think)