Flex plate issue on 4l80e swap! Please help !

[Megamanx268]

I posted a while back with some questions about the 4l60 to 4l80 swap. I have a 1997 z71(350 vortec) and a rebuilt 94 4l80e. Well I am currently in the middle of the swap and have come across an issue.

I bought a flex plate for a 6.0 with the spacer and it doesnt fit. The bolt pattern is slightly different and the hole in the center of the flexplate is slightly smaller. I have been diggin around every local parts store today trying to figure this out.

I found a flex plate that will work off a 2500 with a 350 that will fit and has the six bolt holes for the 4l80 torque convertor however it does not have a spacer and I cant seem to find any info about a spacer for it anywhere..

My question is, do I need the spacer or not? And if so does anyone know more ab it or have a part number? I have seen everywhere that you need a spacer but im thinkin that might only be on the 5.3 or 6.0 engines

Please let me know! I need to get this figured out by tomorrow!

[RedHeartbeat]

The spacer is for Gen3/LS engines, not the SBC engine.

[Megamanx268]

The spacer is for Gen3/LS engines, not the SBC engine.

Are you sure?! And btw thanks a ton! You have no idea!

[RedHeartbeat]

absolutely

[y5mgisi]

Just to add to this, No, you do not need the spacer. The spacer is used on the genIII motors because the crank is shorter and therefore the snout of the torque converter is left un supported. The longer crank in the 350 can support the snout itself and therefore, no spacer is needed.

[SLO TRUCK]

buy aftermarket flexplate from Circle D. I believe they have a stamped steal version and a Billet Version and both have all the bolt patterns needed.