im building a 98 with an lt1 right now, i notched my frame and use the factory transmission mount and shortened my factory driveshaft 1.5 inches and u have to buy angle plug headers ($300) and i recomend a custom wiring and computer tune from lt1wiringharness.com, also u can use the 40 dollar conversion mounts but you have to cut and weld on them and you can use and ac delete pully and u wont have to notch the frame