5SFE Block. Old or new?, Going 5SGTE Options

[RichieRichJP]

After doing a bunch of research and deciding with what to do with my set up, I've decided to go 5sgte rather than 5sfte. The reasons should be obvious since I'm going for a performance build.
In recent weeks, I've done a lot of reading and made a few phone calls and found out that there are two versions of the 5sfe block. Great.
Now between both Camry's and Celica's, what years are the older version blocks and which ones are the newer versions?

[alltracman78]

90/91 blocks didn't come with a knock sensor, 92^ did.
I'm not sure if there were any other improvements to the block itself after 92 or not.
I'd get the newest one possible, hopefully less wear 'n tear.

Camrys also have balance shafts while MR2/Celicas don't. All Camry blocks will have the knock sensor.

The balance shaft isn't part of the block per say, but the crank does have a massive gear to drive the shafts, so IMO pick up a Celica/MR2 one if you can.