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Old 09-25-2018, 11:41 PM   #1
Quikshft
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L31 with mechanical clutch

Do the new L31 crate engines come drilled and tapped for the clutch cross shaft ball stud?
Thanks!
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Old 09-26-2018, 12:04 AM   #2
B. W.
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Re: L31 with mechanical clutch

Mine was not, had to drill & tap.
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Old 09-26-2018, 12:47 AM   #3
Quikshft
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Quote:
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Mine was not, had to drill & tap.
Excellent, I can handle that. Thanks.
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Old 09-26-2018, 09:24 AM   #4
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Re: L31 with mechanical clutch

Had to drill and tap mine to, use a sharp bit. also had to do two for the timing cover. got it running last weekend sweet engine, love it.
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Old 09-26-2018, 09:35 AM   #5
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Re: L31 with mechanical clutch

my 4 bolt main l31 has a hole drilled / tapped just above the oil pressure port above the filter boss area .

the hole goes in to the bell housing cavity .

i think its the right one for mech clutch ? ?
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Old 09-26-2018, 10:09 AM   #6
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Originally Posted by sweetk30 View Post
my 4 bolt main l31 has a hole drilled / tapped just above the oil pressure port above the filter boss area .

the hole goes in to the bell housing cavity .

i think its the right one for mech clutch ? ?
Yes, I put the bracket on and marked the forward hole, donít go too deep use the bottom end tab and a real short bolt.
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Old 09-26-2018, 11:58 PM   #7
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Re: L31 with mechanical clutch

It depends on what year truck you are installing the engine in. The '63-'66 trucks require the forward boss for the ball stud for the bellcrank.
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Old 09-30-2018, 12:08 AM   #8
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Re: L31 with mechanical clutch

It depends exactly what year of a truck you are installing the engine into.
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Old 10-01-2018, 03:43 PM   #9
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Re: L31 with mechanical clutch

My L31 was a take out from a 99 model and accepted a mechanical clutch in my 78 no problem. But I'm pretty sure it attached to the bellhousing not the engine. Been a while so I forget lol.
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Old 10-02-2018, 12:00 AM   #10
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Re: L31 with mechanical clutch

Yes the square bodies have the clutch ballstud bolted to the side of the bellhousing.
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