I will be building a custom cold air box for my '93 K1500 sometime late summer.
And while I use to love K&N products, I soured with them a few years ago. I think the corporate ego cost them their roots. To many viable options out today to deal with ego's!
Although way different then your van, mine will be pulling cold (cool) air in from a hood mounted Trans Am style shaker scoop. Although the replica scoop will be hard mounted to the hood and the air box mounted to the engine.