327 to 383 - Team Camaro Tech
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post #1 of 11 (permalink) Old Apr 24th, 11, 07:56 AM Thread Starter
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327 to 383

Hey all Happy Easter . I have had a 327 chey engine in the back of my garage since 1976 with the hopes to redo it when i have the time . most of you know what i mean lol.any ways its a 2 bolt main with double humped heads so my questions are one can this block be changed to a 383 ? and can it be changed to a 4 bolt main ?
thanks
tony
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post #2 of 11 (permalink) Old Apr 24th, 11, 08:41 AM
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Re: 327 to 383

Greetings from Arizona
not sure about 327 to 383, but if you want 4 bolt main and your motor isan't already machined I'd think it would be better to find 4 bolt main block or buy 383 crate motor and start from scratch. I just helped a friend do 350 to 383 in his 66 Chevyll..its a runner now he's building 406 for his 49 Stude PU Jay


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post #3 of 11 (permalink) Old Apr 24th, 11, 09:33 AM
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Re: 327 to 383

Quote:
Originally Posted by tony -Di View Post
Hey all Happy Easter . I have had a 327 chey engine in the back of my garage since 1976 with the hopes to redo it when i have the time . most of you know what i mean lol.any ways its a 2 bolt main with double humped heads so my questions are one can this block be changed to a 383 ? and can it be changed to a 4 bolt main ?
thanks
tony
Yes to both. The 383 requires a 4" bore your 327 has that. It's possible to add splayed 4 bolt caps to a two bolt block, not sure if it's really necessary , depends on how you set it up for power/RPM.

Jeff
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post #4 of 11 (permalink) Old Apr 24th, 11, 09:51 AM
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Re: 327 to 383

Next question... where to get a good 383 rotating assembly? Where do you stop HP wise for all forged bottom end? Sorry for the hijack.

Robert

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post #5 of 11 (permalink) Old Apr 24th, 11, 10:55 AM
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Re: 327 to 383

Might want to check and make sure it is a large journal block before you pursue this endeavor.
A 2 bolt block will be fine up to 500hp.
Not worth the expenses and extras to splay the block.

Kurt
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post #6 of 11 (permalink) Old Apr 24th, 11, 11:17 AM
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Re: 327 to 383

I thought I remember hearing that a lot more clearance grinding is needed with a 327 block. The 350 block was opened up some for the larger 3.48 stroke? As mentioned make sure it's a large journal block.
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post #7 of 11 (permalink) Old Apr 24th, 11, 02:02 PM
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Re: 327 to 383

so true on all statements--i would use a 350 block the cost is gonna be the same --but if your persistant -you gotta know if its a large journal or not-i would recommend scat for a crank--KB for pistons--and a great machine shop for balancing which is critical(i prefer this over a rotating assy that say they are balanced--i have built plenty of 383s and optimistic 500hp is perty easy--dont forget to chek rod to cam clearance
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post #8 of 11 (permalink) Old Apr 24th, 11, 09:14 PM
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Al
 
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Re: 327 to 383

383 stroker kits are available for the small journal 327 as well. http://www.speedomotive.com/ps-30-8-...roker-kit.aspx


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post #9 of 11 (permalink) Old Apr 24th, 11, 11:52 PM
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Re: 327 to 383

Quote:
Originally Posted by BPOS View Post
383 stroker kits are available for the small journal 327 as well. http://www.speedomotive.com/ps-30-8-...roker-kit.aspx
There ya go!

Kurt
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post #10 of 11 (permalink) Old Apr 27th, 11, 10:15 AM
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Re: 327 to 383

The 2.30" Main bearings of a 327 block is a NO NO for 3.75" stroke.

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post #11 of 11 (permalink) Old Apr 27th, 11, 06:38 PM
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Re: 327 to 383

i have a 68 327 large jounel block sitting in my basement can't wait to use it but nobody can tell me realy the year is i know 68 and above i differeny know it's a 327
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