ya u can make quite a bit of money sellin that ls bottom end u got. boost the gsr n save the money to build that one. u could even use the pistons outa ur ls bottom end if theyre in good shape (wouldnt re use them if u drove the car for a while tho). ls vtecs are great if done right tho. but the gsr is already in the car n it would b a lot less hassle later. and yes a 98 teg is 0bd2. u can get a conversion harness n use ur obd1 ecu, but im not entirely sure about the dizzy. gl with the build. hope it works!