hughesperformance.com
I think this is the snout extension...
HP3795GM 4L60E Crankshaft Adapter for LS1 Motor
Either way should be fine. If you don't plan on keeping that trans in there long then I wouldnt worry about. If it were long term I'd go with the bolt-on spacer and longer bolts.
yeah, slotting would be necessary either way if you use the 300mm flexplate from a Gen3 engine with a 278mm convertor.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
It's because you are using a LQ4 that came in front of a 4L60e originally. You need the spacer and flexplate that would have been on one that was in front of a 4L80e, or use the adpater on the aft side of the curved flexplate.
http://www.ls1tech.com/forums/automa...0r4-4l60e.html
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