doing a custom ls1 swap and want to use my existing th-350. the convertor hub doesn't reach the back of the crank. the engine is a 6.0L. what are my options? i did a search and see some guys talking about a spacer. could anyone be more specific as to what exactly i need(certain flexplate, spacer, special convertor, etc.) also has anyone successfully drilled and tapped the "missing" bellhousing hole or is there not enough "meat" there? thanks.

 

I'm making a "spacer" to allow the converter to engage. It basically consists of a pilot that engages the existing crank snout, goes through the flexplate, and extends with a 1.700 ID to allow the converter to engage the spacer. I'll take a pic when it's done.

 

i did some more research and found that advance adapters makes what i nned also. i have a dealer connection i'm going to see what his prices are too. thanks for the help.

 

well, here's what it looks like. The spacer engages the converter perfectly (.001" slip fit to nose of the converter).

 

nice fabrication. i bought a spacer and matching bolts from a gm dealer buddy and i'm hoping they work. if not i may be giving you some business, lol. i just discovered tonight that there is 2 different flexplates so that might be another issue, i probably have the wrong one.