Can someone advice or help.

Two years ago I bought my 1971 911 Targa S from Florida only find out that the owner sold the s engine separately and put in a 911 T engine on it. I have recently completed the restoration.

Now I want find the original engine of the car.

The vin no is 911.131.0230 the original engine I do not know.

Is there a way to find out the original engine no ?

Thanks

ARADSINC