Just an idea....
Maybe cut threads 1/2 - 13 threads on a long rod so you can check thread engagement. When it bottoms you can then mark the length needed for the longer bolts you need or cut that to length and cut threads for a nut and use it as a stud?
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1968 LeMans conv. 350 HO - 4 speed triple white (hear it idle here) https://www.youtube.com/watch?v=eVmq...ature=youtu.be
1968 LeMans conv. 350 - 4 speed Solar red/pearl
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