u want a good engine that will run for ages? get the 3sfe with a camry boxed around it. they run best that way. you want performance? dont even bother with the 3sfe. the sheer cost to make it RWD would greatly outweigh any benefit you could extract from them.
you cant put a GE or GTE head on a 3sfe. u can if u change internals but nothing simple as swapping heads.
if you are still adamant on extracting power out of the 3sfe then i'd be looking at how much kms its done. then i'd be looking at what you exactly mean by mods? a little more power or heaps more? personally if you really wanted to you can get some more power out of this engine, but as most of the camry guys know, its not the easiest engine to modify and it'll be a long path of customisation as there are next to no parts available.
let me know if you still want to go down this path.
Cheers
Bookmarks