NOS327

iTrader: (30)

I've got the stupid thick crank flange 2000 6.0L which calls for the 399754 flexplate, but my converter is the 10.75 powerglide bolt pattern, so I need the 399753 small pattern unit. If I can leave out the bolted in little center deal and use my old mid-plate shim at the bellhousing, looks like I'll be good to go. So I just need to know if it's kosher to unbolt the center piece from the 399753 and leave it out???

Thanks in advance,
TJ

ironmanLS1

iTrader: (9)

I am new to the LS1 world and can only refer to my experience with first gen stuff. But if you are referring to a boss that centers in the back of the crank don't run without it. If there was a way to index the crank and flexplate to converter with zero runout you would probably be okay, but I don't see how you would have enough room to do that. Just my opinion, but without the boss you could be slightly off center and then have a vibration that will start tearing up parts.

forcd ind

iTrader: (7)

the TCI flywheel was designed to be used w/o the .400 spacer on the engines used when they had 4L80E's
with the long crank, you some how need to move the flywheel .400 toward the engine-i dont think that spacer is .400 thick, it was used along with a thicker flywheel to dup. a .400 meas
the starter wont match up
prob best to use a fact. 4L80E flywheel, or i belive someone makes an aftermarket replacement using the longer crank
i ran some high HP thru a stock plate, but you needed the small pattern, so you would need to redrill it

NOS327

iTrader: (30)

yeah, I ended up drilling on my stock replacement flexplate, seems to have worked fine today, went 10.34 @ 131 on it. The craftsmanship of the stock replacements flexplates leaves a little to be desired anyhow, so my work fits right in, lol.

thanks guys.