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427 Starter - 2 hole or 3 hole nose cone??

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Old 05-19-2017, 05:57 PM   #1
bigredbrad
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Default 427 Starter - 2 hole or 3 hole nose cone??

Spent 2 hours searching forums, Colvins book, NCRS TIMJG, ebay and Im still confused on which starter nose cone is correct.

I currently have the "wrong" starter number with a 2 hole cast iron nose cone installed and starting the car just fine. I want to purchase the "correct" date coded starter to replace it with. My original 427 block appears to have 3 threaded holes for a starter to bolt on, but all my searching does not say if the 3rd hole is used or not.

Here are 2 pics of starters that should fit a 427 in 1968. Other than the Delco number stamped on the starter case, which nose cone is correct both in appearance for judging and functionality for driving?

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bigredbrad




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Old 05-19-2017, 07:55 PM   #2
sug
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My l68 has cast iron two hole like your first pic .
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Old 05-19-2017, 09:15 PM   #3
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I'm pretty sure the three hole starter is a universal starter to be used with two different flywheel sizes.
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Old 05-19-2017, 10:39 PM   #4
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My 68 L36 has the two hole starter too.
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Old 05-19-2017, 11:15 PM   #5
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My engine block has a third threaded hole that looks like it would line up with a 3 hole nose cone. Just hate to buy a 3 hole starter to get numbers matching and find out that it is not correct.

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Old 05-20-2017, 12:49 AM   #6
CanadaGrant
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Quote:
Originally Posted by bigredbrad View Post
My engine block has a third threaded hole that looks like it would line up with a 3 hole nose cone. Just hate to buy a 3 hole starter to get numbers matching and find out that it is not correct.

bigredbrad
My 69 L36 also has the 3 threaded block holes but the stock starter is the 2 hole offset bolt pattern.
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Old 05-21-2017, 09:08 AM   #7
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I know that GM used one flywheel that is smaller and it used the two hole starter that had the holes straight across from each other used on 6 cylinder engines . But all of the corvette small block engines that I have seen take the two hole diagonal pattern . Not familiar with the big blocks though .
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Old 05-21-2017, 09:23 PM   #8
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I just replaced the starter on my 69 427 4-speed with a rebuilt correct one from Zip. There are 3 mounting holes on the engine, but only 2 on the starter, and they are on a diagonal. All works fine now, but it's a hell of a difficult job if you don't have a lift. Also, take photos of the wiring before you take out the original one.
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