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I need to get engine bolts for my 289 and 351c to put the on an engine stand but I won't be able to measure the bolts before I want to go to the store today. If anyone could let me know the thread sizes I'd be very thankful.
 

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7/16 x 2.5" Use a washer.
Coarse thread 13 or 14 not sure which is standard. They will only have one or the other.
 

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7/16-14 UNC
 

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Length depends on your engine stand. Measure the thickness of the arms and add 3/4". Get hardened washers to use beneath the bolt heads.

BTW, SBC main cap bolts work great on my engine stand..... :)
 
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