Twincharger
 

I have a 1994 f250 7.3 turbo diesel power stroke and I want to twin charge it (supercharger and turbocharger working together) where is a good place I can have this done at. Don't care about price, I care about quality.

it has been done in the past and does not work out very well. there have been a couple shops that have done it and they don't do it anymore and every pickup i have known of is not running that setup anymore

Just keep it simple and keep the turbo set-up. You can always upgrade the turbo for better performance and efficiency.