pwr to manual steering

I would not lengthen the shaft. IIRC the shaft has plastic injected between the two halves and lengthening it breaks the tabs etc that keep it the length it was designed to be. the effect would be to allow the shaft to be able to lengthen OR shorten over time. I agree that under normal conditions the steering coupler will only allow the shaft to get so long or short BUT if the coupler top came off ( i saw one such photo recently... DOC!!!!!!!!! Im talking to you!!!!!!! @DentalDart ) the shaft could theoretically come out of the coupler.

Just my 2 cents. Manual columns are out there and unmolested.

and by the way... you won't regret going manual

"The parts you don't add don't cause you no trouble"