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Old 03-02-2013, 09:09 PM   #2
mattfranklin
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Join Date: Dec 2011
Location: Moraga, CA
Posts: 797
Re: PROJECT: How would a Chevrolet dealer build a shop truck in the early 1970s?

Put on a new Holley 4150 today (Holley P/N 0-083770), taking me one step closer to LT-1 specs.

It idles much better than that cobbled Rochester ever did. No adjustments needed. I still need to find a good 12v source for the electric choke. And I need to install a new throttle ball (also known as a ball stud) because the 5/16" one from my Rochester didn't fit -- it's cobbled right now, using washers and the big hole of the Holley arm, just to help it amble around the driveway. I've ordered a throttle ball kit so I can get the proper 1/4" stud screwed into the proper 1/4" hole of the Holley arm.

I learned that the cam I need is the 3972178 (or the '178 for short) to get the valve action and valve sounds of an LT-1. But that may have to wait until the engine gets a full rebuild.

One small step every weekend.
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