Re: TBI to Vortec Swap question
I was only talking about gen III & IV motors ( 4.8 5.3 6.0 6.2 LS1 LS2 etc.) needing a adapter kit (crank to converter hub spacer & a redrilled flexplate)
your vortec 7.4/4L80E came with a 6 bolt converter instead 3 thats the only reason i can think of for you needing a flexplate for the 700R4.
go with the 4L80E. A stock 700R4/4L60/4L60e will NOT hold behind a big block.
If you need help with the wiring let me know.
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