engine swap help
January 30th, 2018, 12:31 PM
#1
Registered User
Thread Starter
Join Date: Jan 2018
Location: West point Georgia
Posts: 1
engine swap help
Hi I'm new to this I have a 1987 Cutlass supreme that I had since 96 ...with a v6 in it I have almost 800,000 miles on it THAT'S RITE ALMOST 800,000 ON IT I JUS GOT A ...1971 olds 350 n trans .... I want to Kno if it's a good Motor...and I want to Kno what all I have to do to get it running.... I want it to have around 300-400 hp.... I hope sum one can help me....this is my first car I bought....
February 11th, 2018, 04:52 AM
#3
Registered User
Join Date: Jan 2017
Location: North Haven CT
Posts: 239
Hi I'm new to this I have a 1987 Cutlass supreme that I had since 96 ...with a v6 in it I have almost 800,000 miles on it THAT'S RITE ALMOST 800,000 ON IT I JUS GOT A ...1971 olds 350 n trans .... I want to Kno if it's a good Motor...and I want to Kno what all I have to do to get it running.... I want it to have around 300-400 hp.... I hope sum one can help me....this is my first car I bought....
February 11th, 2018, 07:21 AM
#4
Old(s) Fart
Join Date: Mar 2007
Location: Northern VA
Posts: 47,310
Welcome. The Olds 350 is a common swap into the G-body cars. Since you are starting with a V6 car, you'll need the motor and frame mounts from the same year with the Olds 307 motor (the 307 and 350 are externally identical). If your car had a three speed TH200 originally, the TH350 bolts in. If you had a 200-4R the you will need the crossmember for a TH200. Valve cover clearances to the HVAC box will be a little better if you can grab a set of the 307 valve covers. While not mandatory, these are slightly reshaped to improve clearances in the G-body. You'll also want the accessory brackets, pulleys, and water pump from a 307 car to avoid mismatches and belt alignment issues. Good luck.
February 11th, 2018, 10:09 AM
#5
Registered User
Join Date: Jun 2009
Location: southeastern Michigan
Posts: 14,168
I ain't buyin' it. 
That's an average of over 25,000 miles per year every year since the car was new. That's an average of over 70 miles per day every day of the 365-day year.
That's a lot of driving. The '87s still had 5-digit odometers, I believe, so there's no way to show with the odometer what the actual mileage is. (If I'm wrong here, and the car does have a six-digit odometer, it should be a simple matter to post a photo of it showing a 7 or an 8 in the far left position.) You've owned it since '96, which means you've owned it for more than two-thirds of its life. If you have had the car for the last 2/3 of the 800,000 miles, that's about 530,000 miles you've put on it if the miles were put on at a steady pace. If you changed the oil every 5,000 miles, that means you've changed it over 100 times, or about 5 times per year, since you've owned it. Do you have all the receipts for all of these changes?
How about tires? If you averaged 50,000 miles on a set of tires, you ought to have bought tires about 10 times since 1996. Do you have receipts for all those purchases?
Few cars come anywhere close to lasting upwards of 1 million miles. We need some kind of documentation to back up a claim like this.
That's an average of over 25,000 miles per year every year since the car was new. That's an average of over 70 miles per day every day of the 365-day year.
That's a lot of driving. The '87s still had 5-digit odometers, I believe, so there's no way to show with the odometer what the actual mileage is. (If I'm wrong here, and the car does have a six-digit odometer, it should be a simple matter to post a photo of it showing a 7 or an 8 in the far left position.) You've owned it since '96, which means you've owned it for more than two-thirds of its life. If you have had the car for the last 2/3 of the 800,000 miles, that's about 530,000 miles you've put on it if the miles were put on at a steady pace. If you changed the oil every 5,000 miles, that means you've changed it over 100 times, or about 5 times per year, since you've owned it. Do you have all the receipts for all of these changes?
How about tires? If you averaged 50,000 miles on a set of tires, you ought to have bought tires about 10 times since 1996. Do you have receipts for all those purchases?
Few cars come anywhere close to lasting upwards of 1 million miles. We need some kind of documentation to back up a claim like this.
Last edited by jaunty75; February 11th, 2018 at 10:13 AM.
February 11th, 2018, 10:21 AM
#6
Registered User
Join Date: Feb 2013
Location: Phoenix, AZ
Posts: 13,756
Well, it's a good starting point but you will need to do a complete rebuild with attention to detail on all of the parts and machine work to reach near 400 HP. 300 HP is relatively easy to achieve, though. The '71 engine had very low compression from the factory (8.1:1) so at minimum you will need higher compression pistons, a good camshaft, an aftermarket intake manifold, and some head work for 400 HP. This will also lead to a torque converter and rear gears to match the engine's operating parameters.
February 11th, 2018, 02:39 PM
#8
Registered User
Join Date: Feb 2013
Posts: 1,475
I ain't buyin' it.
That's an average of over 25,000 miles per year every year since the car was new. That's an average of over 70 miles per day every day of the 365-day year.
That's a lot of driving. The '87s still had 5-digit odometers, I believe, so there's no way to show with the odometer what the actual mileage is. (If I'm wrong here, and the car does have a six-digit odometer, it should be a simple matter to post a photo of it showing a 7 or an 8 in the far left position.) You've owned it since '96, which means you've owned it for more than two-thirds of its life. If you have had the car for the last 2/3 of the 800,000 miles, that's about 530,000 miles you've put on it if the miles were put on at a steady pace. If you changed the oil every 5,000 miles, that means you've changed it over 100 times, or about 5 times per year, since you've owned it. Do you have all the receipts for all of these changes?
How about tires? If you averaged 50,000 miles on a set of tires, you ought to have bought tires about 10 times since 1996. Do you have receipts for all those purchases?
Few cars come anywhere close to lasting upwards of 1 million miles. We need some kind of documentation to back up a claim like this.
That's an average of over 25,000 miles per year every year since the car was new. That's an average of over 70 miles per day every day of the 365-day year.
That's a lot of driving. The '87s still had 5-digit odometers, I believe, so there's no way to show with the odometer what the actual mileage is. (If I'm wrong here, and the car does have a six-digit odometer, it should be a simple matter to post a photo of it showing a 7 or an 8 in the far left position.) You've owned it since '96, which means you've owned it for more than two-thirds of its life. If you have had the car for the last 2/3 of the 800,000 miles, that's about 530,000 miles you've put on it if the miles were put on at a steady pace. If you changed the oil every 5,000 miles, that means you've changed it over 100 times, or about 5 times per year, since you've owned it. Do you have all the receipts for all of these changes?
How about tires? If you averaged 50,000 miles on a set of tires, you ought to have bought tires about 10 times since 1996. Do you have receipts for all those purchases?
Few cars come anywhere close to lasting upwards of 1 million miles. We need some kind of documentation to back up a claim like this.
Thread
Thread Starter
Forum
Replies
Last Post
'69CutlassVert'
General Discussion
19
August 25th, 2011 07:19 AM
