69 Camaro with a few questions

[rlplive]

Hey guys I have posted in this section before quite some time ago. I have had my 69 for about 10 years and I am finally going to force myself to restore this thing. I am 25 years old and am a college student. I am not broke but I can't afford a lot of this sweet stuff a lot of guys are doing. The car presently needs body work and i am taking it to the body shop very soon. I will be having a frame off resto. It currently has a 327 that has a decent said of heads a good cam and has low miles on a rebuild and a th350 trans. I want to go with some dse drop front springs and their drop leaf springs. It has front discs but it has rear drums and a crappy rear so I def want to upgrade those. I am planning on putting billit specialties street star 17" wheels on it. Do you guys think I should use the current engine or swap out while the car is apart? Do you think it would be more cost efficient to go with a sbc/5speed or an ls1/t56? Basically I need a plan of attack and I am really clueless as to how to put it into action. I hope I haven't confused everyone. Basically this is sort of a budget build but I in no way want to use "cheap" parts.
Ryan