carb hole size?

[Junk-Falcon]

what year did they go to the bigger hole?
thanks charlie

 

[Anlushac11]

what year did they go to the bigger hole?
thanks charlie

1969.

C9DE-6090-C, F, J, and K have the 1.5" hole

C9DE-6090-M has the 1.75" carb hole.

In 1975 heads got hardened valve seats for unleaded fuel.

1978 was first year for big log, 1.75" int valves, and 1.75" opening.

 

[Junk-Falcon]

thankyou much

 

[Anlushac11]

Your welcome