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71GMC_3/4T · 10-08-2002, 10:41 AM

Yukon,
I think all the bolts you ask about are 3/8-16, which is coarse thread. If they had a 9/16 head on them, then they are indeed 3/8.
When you bolt her up to the engine stand, be sure to use grade 8 bolts (6 marks on the head), or you may end up with "engine on floor or toe syndrome". Also, be sure those bolts engage at least 1 1/2 diameters of threads (more than 9/16").

10-08-2002, 10:41 AM	#2
71GMC_3/4T Weapons Of Construction Join Date: Apr 2000 Location: Colorado, USA Posts: 1,095	Yukon, I think all the bolts you ask about are 3/8-16, which is coarse thread. If they had a 9/16 head on them, then they are indeed 3/8. When you bolt her up to the engine stand, be sure to use grade 8 bolts (6 marks on the head), or you may end up with "engine on floor or toe syndrome". Also, be sure those bolts engage at least 1 1/2 diameters of threads (more than 9/16"). __________________ 1971 GMC 2500, 402/TH400 4.10 Daily Driver Lafayette, CO