99% of your 'death wobble' is going to come from other components being worn out.
90% of those are going to come from your track (pan hard) bar being worn/loose.
A 2-2.5" spacer in the front is going to be withing the realm of what your OEM control arms can do, and it's going to put more stress on your track bar and steering linkage (drag link, also tire rods a bit if you're using the inverted-y setup). And I recommend you replace your shocks, because they won't be very happy with you.