Reply to "Question for those who are familiar with the European GTS"

That is a 650 mechanical secondary Holley with mechanical secondary pumps, aka, a 650 double pumper.

The first digit of the date code is the last digit of the year. A three digit code would be a '60s carb, a four digit would be a 1970's built carb. The other digits are the month and day of the month.

IF I am interpreting that correctly, the date on that carb is July 17, 1972?

The -2 after the list 4777, is a revision of the original. I'm surprised that there was this carb made in 1972. I thought they were newer than that?

The aluminum tag is the Ford tag that identifies the engine. It is not a detomaso applied tag as far as I know.

The intake manifold is a production line iron manifold. The engineering number indicates that it is just probably the last variation of the production manifold.

It is probably what you will find on all of the 4v 351c's built all the way until production ceased?

The Europeans do not necessarily care for the aluminum intake manifolds since they cause issue with the carbs freezing up in weather below freezing.

The iron manifolds work better for those conditions.

I'm surprised that the carb is changed but the intake is not.

There is no performance benefit to switching to the Ford aluminum intake manifold. It is just a weight savings thing.

Why the engine tag is still on there is a question. Certainly racing the car would have taken the engine out of warranty. Maybe it was left there just for future identification for replacement parts?

I know that even on the Shelby race cars, the stock "Shelby" engines were left there on the race cars for customers.

This way if the new owner blew up an expensive race engine that he bought from Shelby, there would be no hard feelings over it.

Perhaps Detomaso worked the same way.

In the era, the stock 4v Cleveland was probably more than adequate for the Gp3 cars. Those would be raced in "club racing" and not the heavy duty racing were you had manufacturers competing against each other and wanted every available horsepower they could get out of the engines?