Re: 1971 GMC Donald
At this point I finally got to test fire the engine, and after a few foolish snafus, at one point the Holley software somehow reordered the firing order to go 1-2-3-4-5-6-7-8, it made a few spectacular backfires before I decided something serious was amiss! Once it fired though, it ran perfect! No smoke, clatter, no fireworks, it was quite a relief to hear nothing but the purr through the 18" dump pipe.
Here are some shots of the clearance between the fans and the hot side crossover pipe and the Amazon budget heat wrap and turbo blanket that the entire hot side was covered in to keep underhood temperatures down.
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