A good sizable hunk of weight is behind and on those front bumpers. If this is to be a drag car, then the rear bumper may help you out as it is for weight distribution. I've never studied those Aspen R/Ts before, but I'm sure there are hundreds of small pockets here and there where an ounce or more can be replaced with a good alternative or removed all together. I'm sure some of the practices on here will help the cause.
