b16 2nd gen into a 91 teg?
 

I've seen tegs with this swap, what I want to know how easy is it? Does it just drop in, or is there custom mounts needed?

pointless..find yourself a gsr..ull need mounts and ecu

I agree, go with the b18, drops in, no mounts are needed. Try Tiger Japanese, they should have decent prices on engines.