In addition to the SAS job, look for frame rust. The mid 80's trucks are notorious for the frames rusting from the inside out, so by the time you see it, it can be really bad.
Go over the frame with a hammer, especially anywhere the frame transitions from the horizontal (both sides of each side), and where the fuel tank sits against the frame.

Also try to find out when/if the timing chain has been replaced (if it wasn't, bargain down the price).

- seen in FOUR WHEELER mag July 2006 & OFF-ROAD mag Feb 2007 -
'84 4Runner ARBed 5.29s F&R,4.7 & 2.28 t-cases,hy-steer,BudBuilt skid,30spl Longs,36" TSLs,Chevys

'83 P/U, Buick 231 V6,Holley 4 bbl,Weiand intake,Downey headers,TH350 w/700R4 gearset