Has anyone ever put a 5spd manual from a solara v6 or camry v6 5spd into an ES300?
Is this feasable?

Im sure you can but i have never seen it done. i would like to do the same thing with my 1st gen gs300. i could use a 5 speed from a sc300

you can definately put a manual into a es300 but you will have to modify alot. including buying a manual trans ecu and wiring harness clutch and brake pedal new flywheel disk and pressure plate clutch slave cylinder shifter and shifter linkage and new center console to make it look good. it'll get expensive real quick.

Ya you can do it but its gonna take some time and money, your best bet would be to find a 92-93 es300 5-SPD, thats what I did