V-8 to 6 cylinder?? Whats involved? Ideas? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

nejeff · 07-11-2003, 11:01 PM

Thinking very strongly about going to a 250 6 in my 72 Cheyenne Super. I bought another "donor" 72 with a good, non-leaky, runs-on-all-8 cylinder 307 motor but I am hesitating. I still think I want the old' straight six if I can find a good one.

I admit upfront I am challenged...I have neither the money, time ,tools or ability to rebuild anything and I am looking for a nice clean easy swap! I had the stock 350 4 barrel that is in there out 2 years ago attempting to re-gasket so it did not leak and totally botched the job! I am partial to the 250 because I have owned 2, at different times, 69 c-10's both with 250/ 3speed. And I remember them being very easy to work with.

What do you think? Should I do the swap? Will I need different motor mounts? The turbo 350 Auto should bolt up right? ANy suggestions guy's would be great. Thanks.

**BIG ORANGE** · 07-11-2003, 11:14 PM

I got some 6 cly engine towers and a good torque convertor for a 350 running a 6 cly,matter of fact I got a 72 model 6 cly complete but shipping would be a bear!

nejeff · 07-11-2003, 11:18 PM

Would you want a small block in trade and you get the 6 to me? Your tempting me.

nejeff · 07-11-2003, 11:20 PM

Seriously, would I need to change the torque converter?

**BIG ORANGE** · 07-11-2003, 11:27 PM

Going by what the guy said at the tranmission place"yes" because I was gonna put my trans that came out behind my 6cly and use on a V8 and he said there was a difference,that all I know,I'm not a tran expert! I'll pass on the engine swap I dont think it would be worth my time and trouble,but let me know if you want these 2 items 40.00 plus shipping!

munkjeep · 07-12-2003, 03:35 AM

A turbo 350 trans that was behind a 6 cly has a smaller clutch pack in the transmission than a v8 transmission, but I was unaware of any difference in the torque convertor. Is there a difference in the convertors also

nejeff · 07-12-2003, 07:56 AM

Thanks alot guys. Now I'm rethinking the six. Did not know there was a lot of tranny stuff to consider. Thanks all.

07-11-2003, 11:01 PM	#1
nejeff Registered User Join Date: Jun 2003 Location: Nebraska Posts: 63	V-8 to 6 cylinder?? Whats involved? Ideas? Thinking very strongly about going to a 250 6 in my 72 Cheyenne Super. I bought another "donor" 72 with a good, non-leaky, runs-on-all-8 cylinder 307 motor but I am hesitating. I still think I want the old' straight six if I can find a good one. I admit upfront I am challenged...I have neither the money, time ,tools or ability to rebuild anything and I am looking for a nice clean easy swap! I had the stock 350 4 barrel that is in there out 2 years ago attempting to re-gasket so it did not leak and totally botched the job! I am partial to the 250 because I have owned 2, at different times, 69 c-10's both with 250/ 3speed. And I remember them being very easy to work with. What do you think? Should I do the swap? Will I need different motor mounts? The turbo 350 Auto should bolt up right? ANy suggestions guy's would be great. Thanks. __________________ 72' Chevy Super Cheyenne LWB 72' Chevy C-10 (307 Parts Truck)

07-11-2003, 11:14 PM	#2
BIG ORANGE Senior Member Join Date: Oct 2001 Location: Lancaster S.C. Posts: 4,779	I got some 6 cly engine towers and a good torque convertor for a 350 running a 6 cly,matter of fact I got a 72 model 6 cly complete but shipping would be a bear! __________________ Things happen for a reason!

07-11-2003, 11:18 PM	#3
nejeff Registered User Join Date: Jun 2003 Location: Nebraska Posts: 63	Want a small block? Would you want a small block in trade and you get the 6 to me? Your tempting me. __________________ 72' Chevy Super Cheyenne LWB 72' Chevy C-10 (307 Parts Truck)

07-11-2003, 11:20 PM	#4
nejeff Registered User Join Date: Jun 2003 Location: Nebraska Posts: 63	Seriously, would I need to change the torque converter? __________________ 72' Chevy Super Cheyenne LWB 72' Chevy C-10 (307 Parts Truck)

07-11-2003, 11:27 PM	#5
BIG ORANGE Senior Member Join Date: Oct 2001 Location: Lancaster S.C. Posts: 4,779	Going by what the guy said at the tranmission place"yes" because I was gonna put my trans that came out behind my 6cly and use on a V8 and he said there was a difference,that all I know,I'm not a tran expert! I'll pass on the engine swap I dont think it would be worth my time and trouble,but let me know if you want these 2 items 40.00 plus shipping! __________________ Things happen for a reason!

07-12-2003, 03:35 AM	#6
munkjeep Registered User Join Date: Aug 2002 Location: Kentucky Posts: 13	A turbo 350 trans that was behind a 6 cly has a smaller clutch pack in the transmission than a v8 transmission, but I was unaware of any difference in the torque convertor. Is there a difference in the convertors also

07-12-2003, 07:56 AM	#7
nejeff Registered User Join Date: Jun 2003 Location: Nebraska Posts: 63	Tranny involvement Thanks alot guys. Now I'm rethinking the six. Did not know there was a lot of tranny stuff to consider. Thanks all. __________________ 72' Chevy Super Cheyenne LWB 72' Chevy C-10 (307 Parts Truck)



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