for those of you that have big blocks in your K5's...did you have to use different frame stands, or did it just bolt in? and what headers did you use? I talked to summit and jegs, and was thinking about some hedman elite headers...and they both said I have to get factory big block frame stands. is that true, or will they clear without them? just trying to find out what kinda problems I may run into, before I decide what to buy. thanks.