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**71CHEVYSHORTBED402** · 08-01-2019, 07:29 PM

Like others have said, you pretty well need a build sheet.

But......................if you were well familiar with the truck history, and knew what you were looking at, it's possible to build a SPID with a lot of certainty. Just as an example, if the serial number on the frame matches title/cab, the frame was built a certain way (SBC Vs BBC), and the castings numbers on your long block are consistent with the truck assembled date. Good chance what was installed in your truck is what's in it.

Requires a lot of research and experience, but you'd always have the caveat your SPID may not be accurate.

08-01-2019, 07:29 PM	#7
71CHEVYSHORTBED402 Senior Member Join Date: Feb 2009 Location: Northern Nevada Posts: 7,385	Re: SPID is missing Like others have said, you pretty well need a build sheet. But......................if you were well familiar with the truck history, and knew what you were looking at, it's possible to build a SPID with a lot of certainty. Just as an example, if the serial number on the frame matches title/cab, the frame was built a certain way (SBC Vs BBC), and the castings numbers on your long block are consistent with the truck assembled date. Good chance what was installed in your truck is what's in it. Requires a lot of research and experience, but you'd always have the caveat your SPID may not be accurate. __________________ Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly guide (kit) for restoring this truck from the ground up, complete with details including full hardware descriptions. Much of the info. applies to all 67-72 GM. My build thread, with some info. about the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025