Need advise on droping my 69 SWB GMC

[tranz am]

Hello. Today has been a good day for me. I just bought my dream truck A 69 GMC SB. Now I want to set it up the way Ive pictured it to sit. I wont to drop it pretty good but not so low that I'm smacking things. I want it to sit about 5 inches off the ground in front, measuring from under the cross member. I want to drop the same amount in the rear as in the front, keeping that slight rake. Its about a 6 inch drop I'm after. I know that there are different ways of accomplishing this. I'm after a performance related approach to dropping the truck so just cutting the front springs wont be acceptable. I dont know what to do about dropping the rear. I know that there are blocks out there but I hear that they can cause undesired effects. Now with this said I need to figure out What type of parts there are available to accomplish this. I want good quality stuff but I also dont want to pay an extreme amount of money to do it. What Are my options? And what company's provide the best deals on sets. Thanks.