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Old 08-12-2018, 11:51 AM   #21
72K5CSTDarkOlive
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Join Date: Aug 2013
Location: Central Coast, CA
Posts: 774
Re: 427 SBC & 4L80e build

I got the transmission and Tcase back. We upgraded the Tcase input shaft to a heavy duty 32 spline. If you had a th400 the NP205's came stock with the 32 spline and if you had the TH350 yours came with the 27 spline. Not only will this make it stronger but needed to be done in order to mate it to the 4L80e.

I'm using a mock up block to figure out where the transmission/tcase will line up. I had to drill new holes for the mounting brackets. I had to move it back about 2 1/4".
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My Build Thread 72 K5 http://67-72chevytrucks.com/vboard/s...d.php?t=628612

Build version 2.0: 72 K5
6.0 LQ9, 4L80e, NP205
http://67-72chevytrucks.com/vboard/s...d.php?t=793192
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1972 CST K5 Blazer Dark Olive
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