w-lafayette

ok so i just bought a 1986 toyota 4x4 and i will be following my buddy down to costa rica with this truck (he just did a 3.4 swap and is running better than ever) now my thing is is that this truck i just bought, had a 22ret and has had a 22r swap, now i really want to do this trip so my question is with what information i have provided i am looking for opinions for what i should do to this truck before i go (note i dont want to do a straight swap untill i get back) and i am already upgrading the exhaust system with lce header and flowmaster and new cat other than that what should i do to make this truck more reliable before doing this trip, also what oil and what coolant should i be using and it already has a weber carb in it