depends on how stiff and what ride hight you want. unfortunatly with springs for the camry, for the most part, the lower the drop the softer the spring.
Gen 3 Suspension Options
where's barrington? pm ecale3. hes got a manual tranny for the 5sfe that hes been tryin to get rid of. you could likely do a trade for you V6, im sure there are people who wouldnt mind gettin rid of their I4 for a V6. specially since the gas millage aint that musch less on the V6 then the I4 anywyas. but if ya swap in the manual its not interchangeable with the V6 if ya choose to put it back in.