NOS

From my calcs if your running 7.36 in the 1/8th, thats>
60 Foot E.T. : 1.62
1/8 Mile E.T. : 7.37
1/8 Mile Trap Speed : 92.28
1/4 Mile E.T. : 11.67
1/4 Mile Trap Speed : 115
1/4 Mile Trap RPM : 5,561+slip
thats with 27" tyres x 3.89 gears and 410hp at a guesstimate weight of 3300lbs?.

That trap rpm isn't a lot, that cam should pull to 6k in a stock stroke motor if thats what you have? I would look carefully at your fuel/ign system before you hit it with anything. I ran a stock '71 340 motor on spray all the way up from a 125 to a 250 shot with no probs at all, not even a tipped plug, but I did have 2 blue pumps, and 2 x 1/2" lines, 1 just for the N20 fuel, thats not a mandatory thing to do, you can get away with less on a smaller shot but safe IS good when running spray.