How to attach fiberglass hood

I broke the hood hinges about 2 months ago, So I've been racing with no hood, which weighed about 75 lbs. It might be coincidence, but E.T. picked up significantly. Might be weight, might be breathing better, might be both, don't really know. There's gotta be some wind drag though with no hood.
The claim has always been (at least that's the way I heard it) a tenth for a hundred pounds. So theoretically, you should have picked up . 075. More than that, maybe due to more cold air. Less than that, maybe look at your mph, drag from not having a hood might show up there.
(I'm curious what "significantly" is?)
Edit: did they make you run something over the carb? I was told that since I also run with no hood, I have to run an aircleaner or scoop or something, assuming for a carb backfire, I guess.