What is the quickest way to lower a 69 3/4 ton gmc

[TRAV2282]

Hey guys i am new to this site thank god you have one. Any ways hot august nights is coming up, in case you are wondering its a car show that lasts for a week here in reno nevada . I have a 69 2wheel drive gmc 3/4 ton long bed and i was wondering what the easiest way to lower it is. My step dad said to use half ton coils in the front or cut the front coils. And the rear he said to get a shackle or a flip kit but the flip kit is quite the process. So if you guys have any suggestions please let me know thanks