Satisfactory??

Hi Racers, A few years back my son took his duster to the drags for a few runs. I found one of his slips and was wondering if someone can figure out if this 318 is a fairly strong runner.

NOTE: The track is a (bracket strip) with only a 500 foot strip so I don't know if these time numbers can be converted to what it would be at a .25 mile track or if it's even possible. I'm just interested to know)

I know at the time the duster only had:
2:73 gears Non-posi, street tires
318 30 over, 360 heads, 340 cam, 2500 stall, 600 cfm and headers.

Thanks, Jim