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Old 03-01-2007, 11:12 PM   #1
skokie
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Engine tower question

Does the engine tower bolt for a small block need to be grade 5 or grade 8? Also is 1 1/2 to long?

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68 build thread
http://67-72chevytrucks.com/vboard/s...d.php?t=223234
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Old 03-01-2007, 11:14 PM   #2
nvrforgotten52
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Re: Engine tower question

i would use a grade 8... and i believe the stock bolts are 1 inch but 1 1/2 should work fine
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Old 03-01-2007, 11:19 PM   #3
Longhorn Man
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Re: Engine tower question

grade 5 is plenty strong. If i'm not mistaken, that's what they had originally.
The mount it's self is the weak point, it'll fall apart way before the bolt snaps.
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Old 03-01-2007, 11:20 PM   #4
cstm68
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Re: Engine tower question

i uesd grade 8 just to be safe
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