Can someone check these measurements? Is this K5 lifted?

[closer9]

Can someone tell me what the rear hub to fender distance should be for (approximately, I realize there are a lot of variables) a stock or lifted Blazer. The '79 I'm most likely trading for a in a few weeks is 23" from center of hub to the bottom of the fender in the rear. Don't have front measurements. Also, the front wheels seem set back really far compared to the opening. Don't notice this on Dad's '85 2WD pickup. Is that normal for a 4WD?

I'm trying to decide what to do about tires/wheels. I have a very nice set of 33/11.5/16's that I would like to put on it, but that means buying 16" wheels and a lift if they rub. Also considering talking Dad out of a set of 31/10.5/15's that are new,and on a truck he doesn't drive, but he's not really too interested in letting them go.

thanks!