And don't forget the ratio of weight loss.
Sprung weight = 1:1 ratio
Unsprung Rotational weight = 1:3 ratio
Driveline Rotational = 1:15 ratio
Not to mention the much more impressive HANDLING benefits that result from strategic weight loss. Losing 80lbs of AC might not be a ton of help in the 1/4 mile, but it will make a very noticeable difference in handling. (Especially front-end response and grip)
Don't waste another minute waiting on parts, or anything else. Just get out there and start racing! You will suck at first, and you will be slower than many other cars, but the only thing you will regret is not starting earlier...