I wondered about that pump link. Not exactly a hermetically sealed unit, is it?

I have a question about the new needle and seat compared to the old one. why is there such a major difference in these two parts? The old needle is triangular rather than square. It also has a spring included that the old one did not have. Where does that spring go? As you can see the brass seat is completely different. The orifice is much larger in the new one, too.

Remember that this carburetor is not the hodge podge Willys affair but rather a 684 YF from the Carb Shop.

The new mixture screw has such a small head on it compared to the original one, I worry that the spring might be to large and not fit correctly under the head of the screw.

Any thoughts on these things?
Attachments
IMG_20220316_142807.jpg (86.17 KB, 92 downloads)
IMG_20220316_143139.jpg (72.33 KB, 91 downloads)
IMG_20220316_143149.jpg (57.96 KB, 90 downloads)
IMG_20220316_143216.jpg (44.95 KB, 91 downloads)

1950 Chevrolet 3100 (Ol' Roy)

1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)