you need new head bolts for the heads, all the sc pulley's off the donor engine, and the stand the one pulley sits on by the crank, the balancer, fuel rail and the l67 coil bracket, and map sensor.
you can reuse your alt, being a 98 you only have one elbow, the other is cast to the alt bracket. you can get a 99 alt and bracket. or reuse yours. i fixed my leaking elbows once, so when i did my lim gasket, i broke the top one, and only replaced that one so i didnt have to deal with the cast elbow. your choice.
a set of headers are also recommended for a top swap.
