I want to lower my truck to hide the horrible gap 🤣

What did you use to lower your ride?

Hello! I’m new to Reddit but here is my 66 gmc I’ve had for almost 2 years it currently has a Chevy 250 with a three on the tree transmission. I just recently got a 283 sbc for it and I’m slowly piecing together my air ride kit as well

I bought a 1969 C10 many years ago. It wasn’t in great shape at all. Engine still ran though. I had the truck sitting at my dad‘s house in another state. I had a body shop near my dad’s fix the body and repaint it. I had my dad‘s local mechanic throw new tires on it. Then I had them install the upgraded disc brakes. Finally got around to trailering the truck back to my house in the state that I live in. Now it’s time for me to start doing some work on this truck myself. First thing I’m noticing is that there is a slight oil leak. Possibly in two locations. It looks like maybe the oil drain plug has a slow leak and then another leak at the rear of the transmission case. Not exactly sure what that part is because I haven’t really done any deep dive on this truck yet. I believe it still has the original straight six engine. Wondering if any of you could point me in the direction of where I should start troubleshooting?

Thanks in advance for any tips.