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Making a350 a 383

Old 08-08-2011, 10:52 PM
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Default Making a350 a 383

I've got a 2 bolt main 350 now and was considering tearing it down and building a 383 out of it. My question is besides boring the block what other machine work needs to be done for clearance purposes?

Also summit sells a 4 bolt main block block for 700 bucks that is already bored and clearenced. Which would be my better option?

Also curious as to what kind of power gain I could expect to see by going to a 383 if I keep all other factors the same

Currently running lt4 hot cam, 1.6 roller rockers, performer rpm intake, vortec heads, 650 demon carb, compression is around 9.8 to 10. Currently spinning a 21 laser II to 5000-5200 at 60-62 mph, with 350 cubic inches

Any thoughtsbwould be awesome because I really don't wanna spend another two grand to get a 1/2 mph more if you know what I mean
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Old 08-08-2011, 11:11 PM
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Your going to need to buy a 3.75" stroke crank also.
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Old 08-08-2011, 11:33 PM
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Originally Posted by cheech View Post
Your going to need to buy a 3.75" stroke crank also.
Yeah I knew I need a rotating assembly, thanks tho
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Old 08-09-2011, 01:15 PM
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I may be wrong here but I beleive the bottom of the cylinder needs cut back alittle on both sides so the rod dosnt hit,
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Old 08-09-2011, 01:49 PM
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xlt86 depends totally on the kit but with all that hassle go with a 4" stroker kit to make it a 409 especially if it's a 2 bolt block and you make it to a 4 bolt with Steel Splayed caps... I would.
Here' s good pics of notches : http://www.camaros.net/forums/showthread.php?t=96913
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