motor and trans swap advice - The 1947 - Present Chevrolet & GMC Truck Message Board Network

62 bigwindow · 10-23-2017, 08:38 PM

Finally getting around to swapping the factory inline 6 and 3 speed out of the suburban to a 350ci motor and looking for options on which trans to use
Also input on aftermarket motor mounts and trans cross member
Thanks guys

**PGSigns** · 10-23-2017, 08:51 PM

Jamie the engine is a bolt in on your mounts. As for a trans I have a 700R4 in mine with a Ron Francis lock up controller. I used one of the cross members like all the folks sell like ECE and CPP. The cross member for the manual has been removed. I had the drive shaft cut and balanced by a local shop to get the length I needed. I have the Lokar shifter in it and it looks like it came that way. With the 700 lots of folks use the TV made easy setup from Bowtie overdrives.
Jimmy

lowbucktrucks · 10-23-2017, 09:07 PM

What ratio rear end do you have? It's probably a 3.73 or 4.11 since you had a 6 cyl.
I would go with a 700, especially if I intended to go on the highway. (My trucks have a 3.07, I 'm using a th350.)
If you want a manual I would probably go with an NV3500 or 4500
How are you going to drive it, and what ratio gear do you have?? Manual or auto??

**Captainfab** · 10-23-2017, 11:26 PM

As long as your 6cyl is a 230/250, the small block will drop right in it it's place.

You can use a factory trans crossmember from a '63-'87 truck or Suburban.

10-23-2017, 08:38 PM	#1
62 bigwindow Registered User Join Date: Apr 2011 Location: Mocksville NC Posts: 824	motor and trans swap advice Finally getting around to swapping the factory inline 6 and 3 speed out of the suburban to a 350ci motor and looking for options on which trans to use Also input on aftermarket motor mounts and trans cross member Thanks guys

10-23-2017, 08:51 PM	#2
PGSigns Senior Member Join Date: Jan 2011 Location: Hayes Va Posts: 4,569	Re: motor and trans swap advice Jamie the engine is a bolt in on your mounts. As for a trans I have a 700R4 in mine with a Ron Francis lock up controller. I used one of the cross members like all the folks sell like ECE and CPP. The cross member for the manual has been removed. I had the drive shaft cut and balanced by a local shop to get the length I needed. I have the Lokar shifter in it and it looks like it came that way. With the 700 lots of folks use the TV made easy setup from Bowtie overdrives. Jimmy __________________ 60 to 66 Chevy and GMC window decals http://67-72chevytrucks.com/vboard/s...d.php?t=661131 Good friends, good food and a hotrod what else do you need? 1966 BBW long fleet Daily driver 1965 BBW short fleet Sold and going to a good home 1965 Suburban 2003 3500 Duramax 2005 Ultra Classic

10-23-2017, 09:07 PM	#3
lowbucktrucks Registered User Join Date: Dec 2014 Location: Buck creek, sc Posts: 90	Re: motor and trans swap advice What ratio rear end do you have? It's probably a 3.73 or 4.11 since you had a 6 cyl. I would go with a 700, especially if I intended to go on the highway. (My trucks have a 3.07, I 'm using a th350.) If you want a manual I would probably go with an NV3500 or 4500 How are you going to drive it, and what ratio gear do you have?? Manual or auto??

10-23-2017, 11:26 PM	#4
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,246	Re: motor and trans swap advice As long as your 6cyl is a 230/250, the small block will drop right in it it's place. You can use a factory trans crossmember from a '63-'87 truck or Suburban. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE



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