Will 305/50/20 fit?

Guys, I have a chance to buy a set of SS rims with 305/50/20 toyo open country tires with 85% tread, for only $900. they came off a NBS z71 tahoe that was stock, so would these fit my NNBS? the rear will clear, but im concerned about the front. that tire is about 32'' tall, as compared to my 30.4" stock tire. I assume because they fit the tahoe they will fit mine no prob. PLEASE help out, because I have the guy lined up and really want to buy them.

That is what I run on the rear of my truck, with a 3" drop.