350 to 3 speed siginaw - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Doogie · 03-26-2009, 06:00 PM

350 to 3 speed siginaw, i know there is a lot of people that have done this, but hte question is what clutch and flywheel do you use? and the 350 is a direct bolt on to the origional bellhoushing in trying to go from a 230-to 350

thanks again guys. Doogie

Bob 68327 · 03-26-2009, 06:08 PM

Welcome !! I think you mean 250 6 cylinder to 350 v-8 If this is true I would try to find an 11'' flywheel and clutch. One thing to note is with the v-8 in it the motor will set close to the firewall because of the motor mounts . It will work however . If you use the proper mounts for the v-8 that moves the motor foreward and you have a driveshaft that's too short . I hope this helps you out . I'm sure some of the others will chime in on here and tell you if I have forgot or missed something . Good Luck and get us some pictures of your truck !!! Bob

Green Machine · 03-26-2009, 06:25 PM

The 250 6 should already have the large 168 tooth flywheel and 11" clutch. Basically you can use the whole works from the back of the 6, flywheel, disk, pressure plate and release bearing and the starter. And yes, bellhousing pattern is the same, GM made things easy for us.

Doogie · 03-26-2009, 06:26 PM

its a 1965 i guess i posted it on the wrong topic thread but man i think its a 230. so a standard 11" fly wheel and clutch nothing special.

68gmsee · 03-26-2009, 07:01 PM

I'm assuming he means 350 turbo hydramatic to 3 speed saginaw.

Yes, an 11 inch flywheel is what I use on my 68 GMC. I took the saginaw out of a 70 Chevy and used the same flywheel and clutch that was on my 250 engine.

Doogie · 03-26-2009, 07:14 PM

no no 350 small block to siginaw 3 speed.

68gmsee · 03-26-2009, 07:30 PM

Welcome to the board... And as you noticed, when you post there's a lot of misinterpretations unless you give specifics..

But the answer is the same. 11 inch flywheel and clutch assembly. I used that combo on my 69 chevy before I converted to 350 th.

Addition: On my 68 with 250, I used the saginaw off a 70 350. I kept bellhousing, flywheel, clutch, etc. So, unless someone else chimes in with a different answer, you should be able to use the same parts from your 230...

Doogie · 03-26-2009, 07:40 PM

thanks you guys are great.

03-26-2009, 06:00 PM	#1
Doogie Registered User Join Date: Mar 2009 Location: Marathon Florida Posts: 29	350 to 3 speed siginaw 350 to 3 speed siginaw, i know there is a lot of people that have done this, but hte question is what clutch and flywheel do you use? and the 350 is a direct bolt on to the origional bellhoushing in trying to go from a 230-to 350 thanks again guys. Doogie

03-26-2009, 06:08 PM	#2
Bob 68327 72 Chevelle Club Join Date: Jun 2007 Location: Newton , Iowa Posts: 2,052	Re: 350 to 3 speed siginaw Welcome !! I think you mean 250 6 cylinder to 350 v-8 If this is true I would try to find an 11'' flywheel and clutch. One thing to note is with the v-8 in it the motor will set close to the firewall because of the motor mounts . It will work however . If you use the proper mounts for the v-8 that moves the motor foreward and you have a driveshaft that's too short . I hope this helps you out . I'm sure some of the others will chime in on here and tell you if I have forgot or missed something . Good Luck and get us some pictures of your truck !!! Bob __________________ I Have The Right To Remain Silent,But Lack The Ability 1972 Chevelle ... Mine 2006 Trailblazer... Hers 2002 Buick century ... Kids 2002 K1500 Z-71 EXT CAB ... Daily Driver 2005 Rockwood Roo ... For Camping 1974 Harley-Davidson XLH Sportster 84'' stroker

03-26-2009, 06:25 PM	#3
Green Machine Senior Member Join Date: Jul 2004 Location: Estherville, Iowa Posts: 3,371	Re: 350 to 3 speed siginaw The 250 6 should already have the large 168 tooth flywheel and 11" clutch. Basically you can use the whole works from the back of the 6, flywheel, disk, pressure plate and release bearing and the starter. And yes, bellhousing pattern is the same, GM made things easy for us. __________________ 1968 C10 307 3spd Long Fleet ------ http://67-72chevytrucks.com/vboard/s...d.php?t=201103 1970 C10 305 Super T10 Long Fleet --- http://67-72chevytrucks.com/vboard/s...d.php?t=202285 1971 C20 383 TH350 Dana Posi ----- http://67-72chevytrucks.com/vboard/s...d.php?t=206894 2001 GMC Sierra 1500 C3 6.0 Last edited by Green Machine; 03-26-2009 at 06:27 PM.

03-26-2009, 06:26 PM	#4
Doogie Registered User Join Date: Mar 2009 Location: Marathon Florida Posts: 29	Re: 350 to 3 speed siginaw its a 1965 i guess i posted it on the wrong topic thread but man i think its a 230. so a standard 11" fly wheel and clutch nothing special. Attached Images Last edited by Doogie; 03-26-2009 at 06:44 PM.

03-26-2009, 07:01 PM	#5
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: 350 to 3 speed siginaw I'm assuming he means 350 turbo hydramatic to 3 speed saginaw. Yes, an 11 inch flywheel is what I use on my 68 GMC. I took the saginaw out of a 70 Chevy and used the same flywheel and clutch that was on my 250 engine.

03-26-2009, 07:14 PM	#6
Doogie Registered User Join Date: Mar 2009 Location: Marathon Florida Posts: 29	Re: 350 to 3 speed siginaw no no 350 small block to siginaw 3 speed.

03-26-2009, 07:30 PM	#7
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: 350 to 3 speed siginaw Welcome to the board... And as you noticed, when you post there's a lot of misinterpretations unless you give specifics.. But the answer is the same. 11 inch flywheel and clutch assembly. I used that combo on my 69 chevy before I converted to 350 th. Addition: On my 68 with 250, I used the saginaw off a 70 350. I kept bellhousing, flywheel, clutch, etc. So, unless someone else chimes in with a different answer, you should be able to use the same parts from your 230... Last edited by 68gmsee; 03-26-2009 at 07:41 PM.

03-26-2009, 07:40 PM	#8
Doogie Registered User Join Date: Mar 2009 Location: Marathon Florida Posts: 29	Re: 350 to 3 speed siginaw thanks you guys are great.



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