2 1/8 I think it's metric actually, but at that size it won't make a difference.
bottom of car under the driver side.....near the engine bay
No, there is no need to replace the flywheel but it is a good idea to have the flywheel surface machined.
Get a manual on your car from the parts store or from AUTOBOOKSONLINE.COM. This is not a job for the backyard mechanic as you have to hold the engine while the trans is pulled.
No, and you need the flywheel if you expect the car to move. Timing is adjusted in the distributor, not by the flywheel.
The fastest D class car is the RX7.
yes you can all you need to do is switch the automatic flywheel and putt on a standard flywheel and make sure the clutch from the transmission will bolt up to the flywheel.
My 1987 RX7 GXL automatic is getting its' THIRD Neutral Safety Switch, also called the Inhibitor Switch. The switch allows the starter circuit to start the car if the gear selector is in P or N. If the selector is in any other gear the circuit will not open and the car will not start. Sometimes the switch can be "adjusted". Most of the time it is replaced for about $435 part and labor.
Check your secondary injectors! They might be clogged or messed up they kick in at 4grand. And buy a Hanes manual for your car! Best 25 Bucks you will ever spend.
You sell it, and buy an rx7, which a better car anyway
Bolted to the transmission underneath the car
The starter is underneath the car on the passenger side. The flywheel is in the transmission bellhousing.
Directly behind the flywheel.