Cylinder head accessory bolt holes
01-27-2009, 01:16 PM
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Cylinder head accessory bolt holes
I have a set of ported 2.02"/1.60" '462' heads without the accessory bolt holes. Can the accessory bolt holes be drilled and tapped and Is it safe to do so?
01-27-2009, 02:45 PM
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Only if you're just missing one hole. If the heads did not have any of the holes, the material isn't there to drill & tap them, and you won't have a flat surface to mount the accessories even if you did drill and tap them.
01-27-2009, 06:51 PM
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Re: Cylinder head accessory bolt holes
Sell the heads and buy something more modern. The newer heads can easily outperform those old heads and will be much better castings. Even a set of Vortec heads are better.
01-27-2009, 09:48 PM
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Re: Cylinder head accessory bolt holes
If you are dead set on using those heads they made brackets that allow you to bolt your accessories up.
01-28-2009, 12:24 AM
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Re: Cylinder head accessory bolt holes
If you are set on using those heads, there are brackets made that can make the '69+ accessory setup work on heads without the bolt holes, though I can't remember who makes them. I have seen them though. 'Alan Grove' I think might be the name...?
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