Jeff. It was my understanding that the Main reason for the 1000' was short Shutdowns at some tracks! That being sid, I believe had Scott not gotten killed we would still be running the 1320!
Knowing what I know, I don't think you can narrow it down to one specific point. The short shutdowns at probably 4 or 5 tracks definitely was a main point. Tire problems, engine damage from dropped cylinders or from hitting the rev limiters were probably a couple of others. While on the surface most fans think we are going faster to the 1000' then what we were a few years ago is also wrong. I ran Robert Hight in the semi's at the Winternats in 2007 and he went 3.96 to the 1000' on that run so we are not to that point yet.
IMO it was getting to the point where I am sure NHRA was looking at ways to slow the cars down anyways. You have no idea what NHRA has to deal with as far as getting insurance for their events. I think that Scott's accident had a lot to do with the timing of the decision. NHRA had to do something fast and the 1000' racing for the fuel cars made the most sense and still does to me. They didn't have time to come up with a new , slower combination.
As I said before, right now if you look at my computer data after a good run, like a 4.09 at 310mph at the thousand, assuming you lift close to on time and get the chutes out, you are only going around 250mph at the 1/4 mile mark, so by trying to make them run in the 290-300mph range in the 1/4, how is that going to be safer than it is now?? You are still going 40-50mph faster! The extra 320' of shutdown makes a HUGE difference in getting the car stopped if there is a problem. Also with the advent of the transponder a bigger problem like a stuck throttle or something is not as bad as it once was because at approx. 1400 ft, the chutes are going to be deployed automatically and the fuel and ignition systems will be shut off in a case where the driver is unable to get to them in time.
If one day NHRA decides to go back to a 1/4 mile and slow them down, trust me when I tell you that the majority of drivers will get back in and do their jobs just like they do today. It's impossible to make a nitro car or really any race car totally safe because lots of accidents happen even before the 1000' let alone the 1/4 mile but again IMO with all the issues we were dealing with at the time, the 1000' made the best sense and still does.
I guess that if all the tracks had a long enough shutdown for the speeds we are going now, and there were no tire problems or insurance issues we could go back to the 1/4 mile....but they are not and with Pomona being in NHRA's backyard and being about the shortest track on the circuit, I don't see it happening anytime soon, unless it is in the "watered down" form. It's not really fair for a team to have to fix a wadded up race car if the chutes don't work for some reason on a short track, and trust me, I bet on a full run in the high 320mph range at Pomona with no chutes, 7 out of 10 drivers are going into the sand at some rate of speed...and if you have a fire or explosion, you can bump that close to 10 out of 10.
I say, enjoy the racing as it is for now. NHRA is still far and away the best sanctioning body and boasts the best fields and fastest cars in the world!