[Stefano]

W30s are near & dear to my heart.

I have found original broad cast cards (look like an IBM computer card) Behind the bucket seat panel or behind the springs under the rear seat. If the car is a W30 ,the option is listed.

The W30s have a specific carb#, distributor# and heads.Check casting dates to see when the parts were made in relation to the build date of the car.

Heads have external date codes.

There are rear axle ratios which a W30 cannot have, check the code.

Original Red fender wells have distinguishing clues.

Check W30 emblem holes on original sheet metal to see if drilled or punched.

The original numbers matching "factory Doc Watson blueprinted" 455 will not authenticate a W30 as it externally looks the same(casting number) as the std. 455.

All W30s had the W25 Induction hood but not nessarily the rear spoiler, but these options were available on all 442s 70-72.