Lost power all of a sudden. 273 commando.

B-onefan said

Shifting early and doesn't run as good as it did. Check the throttle cable and make sure it didn't slip in the bracket and now the carb is not opening all the way. I know you said it is opening all the way, but is that with the pedal and someone else looking or are you moving the carb lever under the hood with your hand?

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This is what I was hoping, but no. I checked with a friend pressing the pedal and me chick the throttle shaft and linkage, it's completely open and wont travel more. Looked down the carb and it's completely open. Now, this Holley is new to me and I thought it might be the very, very hot temp out today, but I drove it tonight when it's cool and it's the same.