Re: 72 Blazer project. OMG
Don't get me wrong, I've had a few LS/LT based GM V8's in my new daily driver Sierras, and they have treated me well.
Both the original 350 and the 402 in my vintage GM trucks run like swiss watches, even after almost 100k miles each and 50 plus years. Both run points and Q-Jets..
I see absolutely zero need to switch, and frankly get really tired of seeing every single vintage truck with a modern engine. May be great for some, but not for me!
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1970 K/5 Blazer CST 4WD, Bronze, 93k ACT. miles, 350, 4 speed, positraction, 16.5" x 8.25" wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration in progress... 
1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor... 
2017 Sierra 1500 SLT 4WD, Black, 41k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2...
2019 Canyon SLT 4WD, White, 60k miles, 3.6, 8L45, 3.23 LS, 18" wheels
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