If you're going to pump up you're going to gain some fat because you're going to have to increase your calories to bulk up to that weight. Slow gains are lean gains but unless you have freakish genetics there's going to be at least some fat you'll have to shed once you bulk up. You may have to bulk up past your target weight then go through a cutting diet to get down to it. It all depends on how lean you want to be you won't be ripped at 10-13 percent body fat. Some guys have to maintain some fat on their body to give them that bulked up look. I played golf with Eric Dickerson not long after his football career ended and he looked like he only weighed about 190 pounds but he said he was 218 pounds which was his playing weight. His waist didn't look any bigger than 31 inches. I've noticed that some WR's and DB's are so packed with lean muscle they don't look as heavy as they actually are. It proves how heavy lean muscle is compared to fat.