All Small Six jet 57 autolite 1100 200ci

[Adam Eriks]

I recently had my carb off and it has a 57 jet in it I’ve read that the lowest is 65 what’s going on? It runs very well so it is some what of a surprise

 

[ActionYobbo]

What size venturi and what fuel?
I have been tuning with an AFR gauge on a totally stock 68 200 with an 74 large log head and have a 63 jet now and it’s still slightly rich. I have 1.20 Venturi and gas is 89 octane 10% corn.