1600 to 1750, and back to 1600

my guess is...you currently have a mechanical clutch on your 1750 motor, that indicates also 1600 flywheel and clutch; as the 1750 came from the factory with a hydraulic clutch different than the 1600 set-up which was mechanical on alfa sold in the US market

Way too many questions! Early 1750's with Webers had the same flywheel, clutch and bellhousing as the late 1600's. Generally, 1750's with SPICA injection used the larger flywheel and hydraulic clutch bellhousing, though knowing Alfa, there were probably exceptions.
LOOK under the car. The MECHANICAL clutch is either rod or cable actuated. The HYDRAULIC assembly will have a hydraulic cylinder under there with a hose from it to the master hydraulic cylinder located near and attached to .... the clutch pedal.

What's a "late 1600" bellhousing, Gordon? Do you have a picture? Thanks.

Bell

Gordon;

That is way too clean a housing, and I am in admiration.

Gordon, I agree. If you can put a transmission on a piece of white carpeting, it's way, way too clean. Cheers.

It's a GTA CR 5 speed, all fresh and new. It lives in my study due to value and uniqueness, sitting on the white carpet so I can tell my wife it's a "lamp base". A work in progress sort of thing. This makes for a happy household!