The 200-4R. The 700-R4 will fit but a new driveshaft would have to be fabricated due to the 700's longer tail.
Depends on the engine
What size cd player fits 1988 coupe deville
4l60e
13
It's a metric 200R4
Front = 3 & half, Rear = 4x10
probably a BOP turbo 350 tranny.
32mm
Either a TH 200 Metric or a TH 350. Either will bolt right in place of the other. If you have the choice, use the TH 350....much stronger transmission. You can also use a 200-4R 4 speed auto or a TH 400.....but these will require a different cross member.
If it's a Cutlass Supreme (RWD), 4 speed is a TH-200r4. 3 speed is a TH-250. Not sure about the FWD cars (Calais, Cierra).
21mm socket or wrench
All Chevy transmission will bolt right to it up to the year 1999. After that year Chevy REDESIGNED the engines and transmissions.