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The original carb on my stock '71 302 is an Autolite 2100 with the 1.08" bores. I'm not yet sure how it's jetted. This is a 3 speed manual truck, and I'm swapping over to a C4. The present 2100 has no kickdown linkage, so I found a 2150 with 1.21" bores that has the linkage. I'm about to rebuild this 2150 for the 302.
Here's the question: I assume this 2150 came off a 351 of some type due to the bigger bore size. Should I assume that by swapping it to the 302, I'll need to do some kind of jet change? Anyone have a suggestion about jet size if necessary? Is the 1.21" bore size too big? Thanks for any help!
It should be fine. The larger bores will draw in more air so more fuel will required as well.
I wouldn't change anything until you have tried it to see how it runs.
Jimmy
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