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#1 |
Senior Member
![]() Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,234
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need help
okay so i ended up buy a remanded 350 4bolt main from advance auto for 960 buxs the guy installing it will not install it unless i get a new flywheel he says that the flywheel on my 307 is different from the ones that go on the 350 and says that my 307 start will not start a 350 i think different. some please confirm that my parts will bolt up
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David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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#2 |
Registered User
Join Date: Sep 2004
Location: Pierre SD
Posts: 1,533
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Re: need help
According to napaonline dot com, they take the same flywheel. I think most sm chev are the same. You'll need to find out what the specific problem is with the old one.
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I think the world needs a drink... ![]() Help somebody...If you can....VanZant We're not wrong, we're not sorry, and its probably gonna happen again. That's the truth about men. Tracy Byrd ![]() Member# 13924 '70 c10, 350/350 '68 c10 250/4spd '68 c10 no eng/trans fac ps/pb/ac/at (future father/sons project) '48 Chevy Loadmaster Last edited by sdkid; 01-25-2006 at 01:04 AM. |
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#3 |
Senior Member
![]() Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,234
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Re: need help
all he says is it is a different style i the motor i ordered was for a 1971 c-10 with 350 4 barrel with 4 bolt main i was looking at advance auto and it also shows same flywheel and same starter guess i will show himt his in morning
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David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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#4 |
Registered User
Join Date: Jun 2002
Location: central pa
Posts: 1,525
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Re: need help
Are you sure you didn't get a 350 with a 1 piece rear seal? The crank flange is different on them. Other than that I thought they were the same.
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72 longhorn c30 502BB/th400/fact air/4.11rear/ custom camper 72 bug(the better half's) under reconstruction 2009 HHR aqua blue 71 GMC k20 350/sm465 2009 Chevy hd3500 6.6 Victory Red crew cab dually Dave & Jeanne |
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#5 |
Gone Fishing
Join Date: Aug 2005
Location: Fort Worth, Texas 76135
Posts: 12,361
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Re: need help
As long as it is not a 1 piece rear main seal motor, the flywheel and starter will be the same.
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68 Chevy Short Fleetside LSX Swap Under Way 3.73 posi 2.5/4 drop ![]() 2022 Hyundai Tucson Limited 2019 Chevy Traverse Redline Edition Wifes Ride Build Thread http://67-72chevytrucks.com/vboard/s...=1#post3483616 |
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#6 |
Registered User
Join Date: Feb 2000
Location: Center City, MN, USA
Posts: 3,254
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Re: need help
In 1989 I rebuilt a 350 out of a mid-70's Monte and put it in place of my 1972 Chevelle's 307.
I was working at a shop back then so I had access to a hoist where I did all the work. So I get EVERYTHING hooked up. I check everything twice as this was my first project like this solo. I put the car down on the ground and hit the key - All I heard whas the starter moter spinning freely. Yep. The 307 flywheel was smaller in diameter that what I needed. A trip to Midway Chev and $50 later I had that engine running with a brand new GM flywheel on the back of it.
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'70 cab, '71 chassis, 383, TH350, NP205. '71 Malibu convertible '72 Malibu hard top Center City, MN |
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#7 |
72 C30 Trailer Queen
Join Date: Dec 1999
Location: SE MN, USA
Posts: 794
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Re: need help
If I understand things correctly, there are only 2 flexplates available for the small block chevy engine with 2 piece rear main seal:
A 153 tooth (12.75") and a 168 tooth (14"). The 400 small block motors have a unique counterweighted flexplate, and I am ignoring those for this. I think the starter is different depending on which motor is used, and as long as both the starter and flexplate from your 307 are used on your 350, you should be good to go. A quote from Sallee Chevrolet website: "The starter must be matched to the flywheel or flexplate diameter when installing the Premium ZZ383/425 engine. Small diameter flywheels are 12-3/4” and have 153 teeth. Large diameter flywheels are 14” and have 168 teeth. This difference in flywheel diameter requires two different starter housings. Starter noses used with 14” diameter flywheels have two offset bolt holes; starters used with 12-3/4” flywheels have bolt holes that are straight across from each other."
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Chris H 72 C30 133" 72 C30 157" flat-dump 69 C10 short fleet 71 ElCamino 2000 K2500 crewcab shortbed (sold, sorry old friend) 2005 GMC 2500HD shortcrew Duramax 2006 K1500 RCSB and a couple other projects/parts |
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#8 |
Senior Member
![]() Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,234
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Re: need help
when i looked up the 71 c-10 with 350 it calls for the same flywheel as the 307 the 168 tooth flywheel i guess i will get him to try anyway
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David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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