C6 filled tube plug

I've got a c6 that's freshly been built (reverse valve body, rollerized etc.) and it has maybe 200 feet on it .The trans has fresh redline fluid in it and was wondering what to use for the filler tube plug because I want to change the converter and don't want to lose the fluid  or bathe in it! If someone knows what to use of what they ship with it in the fillertube it would be much appreciated. !

i think you mean the dip stick tube?if you have a trans pan on it with a draian plug,i would drain a little into a clean bucket and pull the dipstick tube and replacethe convertor.if no drain plug,use the bucket and just pull the dipstick and let it drain a little.i dont think you will get that much out.