1963 426 stgII max wedge

one bad 440 said
Unless you can see under the carbs I dont see how you could tell them apart, they look identical as far as I could ever tell.
Difference is stgI and II are 1 9/16th primary with 1 11/16th secondary that goes with the 3447S carbs
StgIII is 1 11/16 primary 1 11/16th secondary with the 3705S carbs.

This is stg II with the 3447S carbs.

the intakes are different... the slope of the ports is different from intake to intake...

Rubyredsavoy said
It is a Stage 1 intake. Stage 2 has the larger primaries for the 3705 carbs and the stage 3 has a different slope to the plenum. 413 MW are not stage one engines.

i thought the intake on two and three were different...

but 413's were stage 1's...

krazykuda said
I thought that 63 was the first year of the 426 MW, therefore all stage I's were 413...

exactly