400 Turbo-hydromatic transmission. FYI: The 501 was not the c.i. of the motor. It was a designation for the Cadillac engine family, which included the 472 c.i. and 500 c.i. engine. If your car is the Eldorado then it is the 500 c.i. engine. Other than the Eldorado, you have the 472 c.i.
727 automatic.
In a 1973 Dodge Coronet , the 318 was set at ( TDC ) with the automatic transmission ( a 1973 manual transmission equipped 318 was set at 2 and 1/2 degrees BTDC )
255
It is a 2 speed automatic transmission that General Motors used from 1950-1973.
It should tell you right on the transmission dipstick.
A-108 transmission.
Cruise-O-Matic
dexron III
For 1973, the idle speed for an automatic transmission is 600 rpm when choked, and 450 when warm. For a manual transmission, 900 rpm when choked, 450 when warm.
The power of the engine and the maximum speed of the 1973 Chevrolet Laguna Automatic Wagon is 108 kW and 130 km/h (81 mph) respectively.
any engine carburated i would go with the 1600
That will vary according to the engine and transmission.