HEY PAUL I JUST CHECKED SOME OF THE PT NO,S AND THE PICKUPS AND THE TROOPER WITH THE TURBO HAD THE SAME FLYWHEEL AND THEY ARE NEUTRAL BALANCED, MEANING THEY HAVE AN INTERNAL BALANCE FOR THE ENG, AND THE NON TURBO FLYWHEEL IS FOR SOME REASON ABOUT 10 LBS HEAVIER, BUT IS ALSO NEUTRAL BALANCED , IF I HAD MY CHOICE I WOULD DEFINATELY USE THE LIGHT WEIGHT WHEEL ESP IN YOUR CASE OF THE PICKUP , AS YOU SHOULDN,T NEED THE OFF LINE ENERGY FROM THE HEAVY STOCK FLYWHEEL, SEEMS STANGE THAT THEY DIDN,T USE THE HEAVY FLYWHEEL IN THE TROOPER BECAUSE OF THE LARGE AMOUNT OF ADDITIONAL WEIGHT OF THE VEH, EVEN THOUGH THEY WILL BOTH INTERCHANGE AND THEY BOTH USE THE SAME CLUTCH AND PRESSURE PLATE ASSY, ONE THING ALLSO THERE WAS 2 DIFF, FRONT HARMONIC BALANCER ASSY, FOR THE TURBO ENG ONE WITH A.C. AND ONE WITH OUT , I WAS TOLD THAT THEY WERE BALANCED IN SUCH A WAY THAT WHEN THE A.C COMP WAS ENGAGED THE HARMONICS CREATED BY THE A.C. COMP WOULD BE CANCELLED BY THE DIFF OF THE BALANCE IN THE DAMPNER, HOWEVER YOU COULD USE THE A.C. DAMPNER ON A NON A.C. EQUIPPED ENG , GUESS WHAT WHEN YOU ORDER A FRONT DAMPNER NOW BOTH THE OLD NO,S SUPPERCED TO ONE NO, AND IT IS THE A.C. BALANCED NO , WHEATHER IT IS FOR A.C. OR NOT SO IT EVEIDENTLY WAS NOT A BIG BALANCE PROB, LIKE IT WAS FIRST THOUGHT, ONLY ONE NO. AVAILABLE NOW , AND IT COMES WITH A NEW HUB, CAN,T BUY THE HUB BY ITSELF, OR THE ENERTIA RING (PULLY) BY ITSELF, I HAVE HEARD SPENCERS DSL RUN AND THAT THING IS REALLY SMOOTH RUNNING, I JUST FINISHED UP AN ENG FOR A CUST, WHICH WAS A 2.2 C223 WITH A NON TURBO CRANK BUT WITH TURBO RODS AND PISTONS , AND A SMALL FLYWHEEL , IT IS AN AUTMATIC TRANS AND THIS THING REALLY IDOLS SMOOTH, THE MAN THAT OWNS IT SAYS THE ORIG, ENG NEVER IDELED LIKE THAT, AND IT SURE DIDN,T PULL THE HILLS OF NORTH GA LIKE IT DOES , AND HE IS GETTING 26-28 MPG WITH 4.11 GEARS AND A 3 SPD AUTOMATIC STOCK DSL CONVERTOR WITH A STALL SPD OF ABOUT 1600 RPM , FROM A DEAD STOP IT ACCELS ABOUT LIKE A NON TURBO , BUT AT ABOUT 20MPH WHEN THE BOOST COMES UP MAN THAT THING REALLY TAKES OFF, AND I SET IT TO A MAX OF 12 LBS WITH A 2.5 IN, EX ALL THE WAY FROM THE TURBO BACK THRU THE MUFF AND OUT , BETWEEN SHIFTS THE BOOST WILL DROP ABOUT 2-3 LBS AND HANG RIGHT IN THERE , I CAN,T READ THE GAGE ANY CLOSER THAN THAT, EGT DROPPED FROM 1050 F TO LESS THAN 800 ON HARD PULL IN SEC, GEAR AS SOON AS IT HITS 3RD THE TEMP SETTLES RIGHT DOWN , I THINK THE EXHAUST MADE MORE DIFF IN THE TEMP THAN I WAS EXPECTING , NOW WHEN THE TURBO STARTS TO SPOOL UP YOU CAN HEAR IT START TO WHISTLE A LITTLE BIT WHERE WITH THE STOCK 1 5/8 PIPE IT JUST FELT STRANGLED , THAT WAS A TOUGH FIT TO GET THE 2.5 PIPE IN UP BY THE STARTER AND UNDER THE TURBO OUTLET JERRY