a workshop
Need to know what make and engine this 1972 is.
Yo can not "change" an engine code. You need to repair what is causing the code.Yo can not "change" an engine code. You need to repair what is causing the code.
The core will need to be replaced.Don't waste time trying to repair an old core.
Need to know the engine size.
if your tailpipe is pouring smoke then you have internal engine problems and need to take it to a mechanic or you need to change your oil
you need to install idler gear or remove idler gear depend on the engine to counter the direction also you need to change the engine oil pump direction and you need to change the cam shaft directions
You need to change the timing chain on a 3.8 Commodore engine when it becomes worn out or it brakes. This is not considered routine maintenance.
you will need V8 motor mounts and a bigger radiator.
the transmission is located on the driver's side of the engine and yes the engine has to be removed to change the transmission
no
no you will need to change the trans no you will need to change the trans
There's a kit available with all the parts you need.