Motor and trany options - The 1947 - Present Chevrolet & GMC Truck Message Board Network

chevy88 · 01-31-2012, 05:19 PM

I need a new motor for my 1971 truck with 3.73 rearend. I can go with either with a 1989 350 chev truck 180,000 miles/700r4 or 1984 307 buick lesabre 90,000 miles/200r4. I do not pull anything with this truck so the power does not matter to me. I am leaning toward the Buick choice as it has less mileage. My main concern is which would be the easiest to install and get better mileage?

406 Q-ship · 01-31-2012, 06:38 PM

That 307 is going to be an Oldsmobile engine if it came from a 1984 Buick. The 350 would be an easier bolt in on the mounts. Myself I would refresh the 350 and use the 200 4r out of the Buick (200 4Rs are dual pattern usually and will bolt to BOP or Chevy).

chevy88 · 02-01-2012, 04:29 AM

Thanks I will use the 350 then with the 700r4 if it will bolt right in.

01-31-2012, 05:19 PM	#1
chevy88 Registered User Join Date: May 2007 Location: Southern, Saskatchewan Posts: 640	Motor and trany options I need a new motor for my 1971 truck with 3.73 rearend. I can go with either with a 1989 350 chev truck 180,000 miles/700r4 or 1984 307 buick lesabre 90,000 miles/200r4. I do not pull anything with this truck so the power does not matter to me. I am leaning toward the Buick choice as it has less mileage. My main concern is which would be the easiest to install and get better mileage? __________________ Kerry My build thread. http://67-72chevytrucks.com/vboard/s....php?p=3657823 1971 Chev SWB with 68 nose, 6.2 diesel th350, and 3.73 rear gears 1988 Chev Extendacab 2010 Honda VT1300CS Sabre 2005 Buick Rendezvous wife's ride Last edited by chevy88; 01-31-2012 at 05:34 PM.

01-31-2012, 06:38 PM	#2
406 Q-ship Registered User Join Date: Oct 2010 Location: Largo Florida Posts: 632	Re: Motor and trany options That 307 is going to be an Oldsmobile engine if it came from a 1984 Buick. The 350 would be an easier bolt in on the mounts. Myself I would refresh the 350 and use the 200 4r out of the Buick (200 4Rs are dual pattern usually and will bolt to BOP or Chevy). __________________ Lifes journey is not to arrive at the gate well preserved, it is to slide in sideways all used up and wore out yelling.....God what'a ride! Where patience fails, force prevails Stapp's Ironical Paradox "The universal aptitude for ineptitude makes any human accomplishment an incredible miracle."

02-01-2012, 04:29 AM	#3
chevy88 Registered User Join Date: May 2007 Location: Southern, Saskatchewan Posts: 640	Re: Motor and trany options Thanks I will use the 350 then with the 700r4 if it will bolt right in. __________________ Kerry My build thread. http://67-72chevytrucks.com/vboard/s....php?p=3657823 1971 Chev SWB with 68 nose, 6.2 diesel th350, and 3.73 rear gears 1988 Chev Extendacab 2010 Honda VT1300CS Sabre 2005 Buick Rendezvous wife's ride

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