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Message: <blockquote data-quote="stutaeng" data-source="post: 27619" data-attributes="member: 6175">The 4.8 has a shorter stroke than the 5.3/5.7/6.0, or not sure I'm following you on that?Long crankshaft 6.0 would be perfect to pair with a 4L80e (4L80e swap your truck is what I'm saying here...) Why would want to use a TH350 or weaker 700R4 or first gen 4L60e? They sell custom torque converters to make that long crank work with your LS-based 4L60e.Other options is to take your 4.8, swap to the factory crank/rods from a 5.3 and effectively convert it to a 5.3. Or crank/rods and bore it to 5.7 for an iron block LS1/LS6...Or do a combination and stroker aftermarket crank. 3.90 or 4.00" stroke. There are a lot of options out there.</blockquote>