[Bobboloo]

As John pointed out the only way to tell for sure if they "match" is to get the COA from PCNA. Looking at the serial numbers you posted more than likely they probably are a matched set.

Since your car has the serial number of 911330(0870) it was approx. the 870th S coupe to roll off the line in 73'. There was a total of 1430 S coupes and 925 S targas built in 73'. There was no differentiation between coupe and targa motor serial numbers. If the car had a sporto tranny then it recieved a number that designated that it matched a sporto.

There were 2231 S motors made in 73' and 136 S sporto motors made in 73'.

If your car had been made early in the production year then the motor and cars serial number would be close in sequential numbers.

Example: Car 9113300001 (first S coupe of 73') could very likely have motor number 6330001 (first S motor of 73') but motor number 6330001 could have just as easily gone in a S Targa. As the production year went on the motors' serial numbers got farther away from the cars' serial number.

Considering your cars sequential number is 0870 and the motor is 1154 they very likely match. If the motor number had been 0870 or less it very likely wouldn't be a match. Also if the motor sequential number was close to the end of production say 2231 then it also probably would not be correct.

Your tranny should be type number is probably 915/02 (5-speed). It would be 915/12 if it's a 4-speed.