yes

giving a rough overlay is simple

yes

if you ask for specific years
we as in toyota people can give you more indepth answer

but usually all it is, is ecu, throttle bodies, wiring harness, and sometimes slight internals but thats it

99-01 es300=97-01 camry v6/99-01solara v6

01 on 1mzfe was revamped and slight internals were changed, ecu, harness, and more specific emision & other control devices


earlier years don't really matter= if anything goes wrong just custom a 1mzfe or 3sgte into it andyou'll be straight and it will be slightly more than an overhaul or oem swap with twice the hp and twice the fun