first off, a C20 doesn't lend itself to lowering as well as a C10..
my advice [even though you didn't ask for it] hang on to gramps truck for a little while as is and don't be too hasty to make serious mods yet..
there is a huge collector market and fan following of original trucks, so you can still be 'in' with a stocker..
do some research, save some money, and make sure what you're about to do is what you'll feel comfortable with down the road..
there's a mile long list of regret stories from older guys that were once in similar situations you're in..
10-20-30 years from now, you may better appreciate your grandfather's truck as he owned and drove it..
lowered C10's and abandoned projects are all over the place, maybe keep your working C20 to haul parts for a proper C10 project?
good luck with your decision!
btw, 2 demerits for no pictures, hint, hint
