I don’t mean to step on anyone’s toes by offering some suggestions, but I love football and I was a rather under sized Defensive End, OLB here in San Diego County. I weighed approx. 190(Coaches lied and put 210 on our roster.)
The things that worked best for me, were squats. Tons of 'em… do 'em twice a week at least. You’re gonna need massive legs. Also, get someone else to simulate a snap count and snap a ball at random times… having you explode through a cage, or bar held at just above waist level when you’re standing. This way you can practice at staying low and getting off the ball as fast as possible. If you can explode into the backfield with strong legs you’ll wreak all sorts of havoc.
My numbers were similar to yours at the end of my Jr. year and I got 'em up a bit better by my Sr. year. I was in no way the strongest or fastest guy on the team but technique, and hard work will make you better then the most physically gifted athletes. If you're willing to do what it takes.
And Davies, do you mind if I e-mail you with my numbers? I may have a chance to join a semi pro team here in San Diego, and I’m sure you can help me make some great gains in the speed, str area.