Plan on spending anywhere from $100.00 to $500.00 on a good dash, depending on what comes with it. I recently paid $100.00 for an empty dash housing with no cluster. Luckly that was all I needed. I just had to paint it to match my original and swap my cluster and heater controls to it.
My original had a crack in it and someone hacked out where the radio goes.
while I had it apart I replaced the dash harness with a new one from National Parts Depot for around $300.00, it fits and looks like the original.
Also keep in mind that the dashes are the same with or without A/C. In fact, the vents and heater & A/C control from your sweep dash will fit the SS dash. You will also need the speedometer without the shift indicator, which works with a console.
Good Luck.
Jeff Litka
72 Chevelle SS
72 MonteCarlo
[This message has been edited by JSL (edited 12-20-1999).]