Hey guys and gals. I have a 93 w350 manual service truck 4.11 gears dana 80. It weighs 15k with a empty fuel tank and a empty bed. I work out truck every day and i am looking to do some upgrades on it. Engine is bone stock 220,000 miles in it. Been a service truck its whole life. I believe it was a cab and chassis truck that went straight to IMT in 93 for service bed. I'm planning on pulling cylinder head soon its pushing coolant out of side. I'm going to install valve springs and possibly head stud it??? I ordered a BD exhaust brake for it and a 4in exhaust system for it. When I have it apart for head and tappet cover I'd like to upgrade turbo while its apart. I'd like to keep same flange on turbo where it vband clamps to exhaust brake. I live in hills so a faster spool would be nice but it weighs so much I dont want crazy egts. Could I upgrade the exhaust housing or the impeller of the stock turbo?? I'm not looking for crazy power. Just something to liven it up a bit. Any input is much appreciated thanks