It's no surprise to folks here that I'm confused. Please bear with.

First pic is my intake manifold and its plastic spacer with 2 holes in it. This is after I removed the Rochester Monojet from it. Does a Carter YF 2100S go right on top of the same plastic spacer?

The 2nd pic shows 2 gaskets. The one on the left goes under the plastic spacer, right? Is the one on the right appropriate on top of the spacer for both the Monojet and YF?

The 3rd pic compares the Monojet and YF bases. How can a YF carb so simple in the number of holes on its base (2) be simply swapped for the MJ with its 6 holes?

More later when I figure what to ask.

Thanks.
Attachments
Carb Base Spacer.jpg (51.61 KB, 102 downloads)
Carb Gaskets.jpg (33.72 KB, 102 downloads)
Monojet and YF 2100S.jpg (44.66 KB, 103 downloads)

1948 3/4-Ton 5-Window Flatbed Chevrolet

34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.