We tell you the truth these motors love boost and the bottle. It sounds like the cheap Vortec build is right for you. Search for it. I think its what $1500 to do a build it yourself kit.
^ Since we're on the subject , do you miss the skip shift and the shitty monsoon system? Or how about changing the spark plugs and wires with Stock headers ?
if you dont want to dismantle the car you can always just do the gear swap, xpipe and a diablosport/sct tuner and if you dont like the outcome you can easily return back to stock, besides gears..you can get a tuner and midpipe fairly cheap on clist..drop in k&n filter and a 70mm tbody will give better throttle response...those will be cheapest most affective bolt ons
sounds to me like your leaning on going back to the Camaro... even though you think a supercharger is a crazy mod to do these cars love and respond very well to them like everyone said just piece one together and it wont be expensive then you will be more then happy with the car... drive ability is very good with the vortech too
We're also telling you power adder first because a lot of us have been down the road of going after all the cheaper bolt ons and being disappointment. Going back to what I said before if you're wanting a bit more out of it do full exhaust with longtubes and o/r x and gears. After reading everything you're saying it sounds like you need to go at least 4.10's instead of those 3.73's. Gears are cheap brand new anyways so I would pass on the 3.73's even though you said you can get them cheap.
I'm also speaking from first hand experience. I didn't feel crap with any of the bolt ons except for the longtubes and gears. Even then the feelings were minimal. I had my car on the dyno with all the bolt ons except for underdrive pullies and made 248hp/284ft lbs untuned. Add a good tune and heads/cams you might be able to break 300hp/300ft lbs. Even if you do it won't be by much. Seems like that would maybe make you happy. But you are saying no power adder and no breaking into the long block. We are saying that power does not come in the form of bolt ons for these cars.
You can get low 13s on bolt ons, easily. But if you want anything comparable to the power and torque of an LT1, save yourself the hassle and money on the bolt ons and do a budget vortech setup.
I spent tons of money on little bolt ons here and there before finally building a vortech. Lesson learned...