a stage 3 saph would be ideal try and find 1 with a t34/t35 turbo,rs500 cooler,uprated shocks,brakes the more the better! rust usually can be found on the rear arches/tailgate/sparetyre well,also rule number 1 check the vin plates especially the 1 by the drivers seat,dont wanna buy a ringer! avoid cars without any history. yb is just an engine code red top was leaded eng, green top was unleaded the better 1 more stronger