I have done just that. I said EFF the rain and went to the yard today. Found a 94 RCSB with a 5 speed, a Hurst shifter, a computer, and this:
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I ran the numbers quick and it's a 5.7L that, while maybe not original to the truck, it definitely an 88 - 94. Someone did a TBI to carb conversion already. Oh, and I kinda wanted the bling'ed out pulleys.
So for whatever reason, another guy came by this same truck and wanted the seats. They were mint, but no headrests. Then, the gentleman stayed and helped us (my Father was there, too) pull that engine. If that person happens to be reading this post - I thank you again, sir.
So, a few hours later:
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I don't want the long block. I just want a piston or two (providing they are shallow groove, and standard bore). I pulled the driver side head and quickly learned that this engine is pooched. See cylinder 5. It also has a severely spun main bearing at that same cylinder. The pistons measure at standard bore, though.
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It had already DOWNPOURED twice at this point and we weren't trying to stick around for anymore rain. So, I pulled the oil pan quick and removed the rod cap from the #1 piston. It took minimal effort to slide the piston out of the cylinder.
The moment of truth! It's a shallow ring piston, measuring in at .165" YES!
Now on to the bling. Or not. The yard was about to close so I had to pack my tools up quick and get out of there.
On the bright side, that means no one else can get these parts today. If I manage to get there when the yard opens in the morning, my chances of still finding treasure are pretty good. Besides, I had pulled the Hurst shifter and the computer already - and totally forgot them at the yard! Between the rain, feeling rushed, and pushing closing time at the yard, I just wanted to get the Hell out of there.
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