Im swapping in a 94 T-56 and on my doner 94Z car there is a small bushing inside the center of the crankshaft on the back where the flywheel is, where my auto xmsn does not have it. Do I need this bushing for the swap?? If I do what is it called so I can get it from the dealer. Thanks in advance!!

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Convertible, L98, Mini-ram, ZZ9 cam, Comp Cams 1.6/1.52 steel roller rockers, Trick Flow 23* heads, K&N's with chopped airboxes, March underdive pulleys, Edelbrock ceramic coated TES, Flowmaster cat-back exhaust, Dynomax high flow converter, Accel box & coil, Taylor 409 wires, Fastchips custom chip, MAC sub frame connecters, Lakewood LCA & Adj. Panhard rod, SLP 2500 stall, 3.23 rear gears, 1LE aluminum driveshaft, white face gagues, and NOS!

 

It's called a pilot bushing. A standard bronze one is about $3 at most parts stores.
YES YOU NEED IT.
When my T-5 blew, I had a $20 moroso roller pilot bushing in there... that went kablooey and caused my clutch to get all messed up so I put a plain stock one in for the T-56.

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'89 Formula - Thunderchicken - 355 Vette L98/T-56/3.45 9-bolt/black/t-tops - the fun car!
'90 GTA - The GTA - 5.0 LB9/TH700/3.27 9-bolt/black/t-tops/tan leather - the cruiser.

 

Thanks Brian!!