[dsraven]

just be aware that if you drop the front end 3" and install the new parts level with existing frame the geometry will be off and it may drive like your old camaro did. the caster will be way off. the way around that is to set the truck up at the rake angle you want and then install the front end to sit level as it is engineered to do. maybe ask those questions when you purchase the parts to get detailed instruction on exactly how to do the install.
a quick mock up would be good to do to see if you like the look at the rake angle you are thinking. simply get a dimension of the front bumper to ground at the stock height, then jack it up and take the front wheels off. let it back down to the height you will be at when the new front end is installed, block it there and set the wheel back in the fender opening. it is also a good way to see what your axle center line should be so your new front end will be in the right place. since the fender openings are angles on the rear side and not on the front side of the opening it can make the tire look like it is being stuffed into the back of the wheel opening as the truck is lowered down.
too much rake will put more weight on the front axle and the rear wheels may spin easier and also skid easier when braking.
so right now the axle is 3" below the frame, you are proposing a 3" drop so the axle will be level with the bottom of the frame, correct?
will your tires be able to turn without hitting the fenders when you go over a bump?
what is the tire size recommended for the corvette front end they will be selling you? different tire outside diameter may have an effect on the steering geometry, scrub angles etc.
will the track width be the same as the original axle? will you need to change the rear axle wheel bolt pattern to match?
just some thoughts.
nice looking truck. I am partial to blue though