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  #41  
Old December 3rd, 2017, 02:23 AM
1965GMCK1502 1965GMCK1502 is offline
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Default Re: Intro 1965 GMC K1502

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Originally Posted by Ed Snyder View Post
Your truck appears to be lifted by a couple inches or so. Here are photos of the factory lift block on the rear end of my '62 Suburban, and the front end showing no block.
Thanks, Ed. The rear block on yours looks like a 6” lift? Would you be able to measure? Thank you.
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  #42  
Old December 3rd, 2017, 03:09 AM
1965GMCK1502 1965GMCK1502 is offline
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Default Re: Intro 1965 GMC K1502

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Originally Posted by Ed Snyder View Post
Your truck appears to be lifted by a couple inches or so. Here are photos of the factory lift block on the rear end of my '62 Suburban, and the front end showing no block.
Also, I see the rear lift on yours came with a stop extending out from the block to receive the axle bumper. Guess that’s missing from mine as well!
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  #43  
Old April 7th, 2018, 09:33 PM
1965GMCK1502 1965GMCK1502 is offline
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Default Re: Intro 1965 GMC K1502

Finally getting around to lowering the truck. Front down to factory specs and rear lower by 2". Dual exhaust going in shortly. Any favorites when it comes to mufflers?
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  #44  
Old April 7th, 2018, 10:00 PM
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Default Re: Intro 1965 GMC K1502

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Originally Posted by 1965GMCK1502 View Post
Dual exhaust going in shortly. Any favorites when it comes to mufflers?
I'm sure everyone has their favorite, so you may get a variety of opinions. This may not be relevant, but years ago I had a '66 Nova with the 350 HP L79 engine. It had Flowmaster 40s on it when I got it. The droning noise and resonance at certain RPMs was so bad I had them replaced with Magnaflows. No more headaches! I can't say the Magnaflows were much quieter, but they were certainly less annoying.

You might find this comparison interesting: http://exhaustsystemsguide.com/magnaflow-vs-flowmaster/
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  #45  
Old April 8th, 2018, 12:55 AM
1965GMCK1502 1965GMCK1502 is offline
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Default Re: Intro 1965 GMC K1502

Quote:
Originally Posted by Ed Snyder View Post
I'm sure everyone has their favorite, so you may get a variety of opinions. This may not be relevant, but years ago I had a '66 Nova with the 350 HP L79 engine. It had Flowmaster 40s on it when I got it. The droning noise and resonance at certain RPMs was so bad I had them replaced with Magnaflows. No more headaches! I can't say the Magnaflows were much quieter, but they were certainly less annoying.

You might find this comparison interesting: http://exhaustsystemsguide.com/magnaflow-vs-flowmaster/
Thanks for the tip, Ed. Much appreciated.
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  #46  
Old April 8th, 2018, 01:00 AM
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Default Re: Intro 1965 GMC K1502

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Originally Posted by 1965GMCK1502 View Post
Thanks for the tip, Ed. Much appreciated.
You can read a lot of other opinions too, on this site: https://www.bangshift.com/forum/foru...-vs-flowmaster

Many of them comment on the annoying drone of the Flowmasters that I experienced at highway speeds.
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1967 CM1500 pickup 351E & NP435
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  #47  
Old April 8th, 2018, 01:40 AM
1965GMCK1502 1965GMCK1502 is offline
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Default Re: Intro 1965 GMC K1502

Quote:
Originally Posted by Ed Snyder View Post
You can read a lot of other opinions too, on this site: https://www.bangshift.com/forum/foru...-vs-flowmaster

Many of them comment on the annoying drone of the Flowmasters that I experienced at highway speeds.
Thx again, Ed. I’m going to go straight out the back with a smaller pipe (2 1/4 or 2 1/2). Also, not sure I’ll be doing any highway driving so think I’m going to try the 40’s and work my way down if I find them too loud.
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  #48  
Old April 8th, 2018, 05:58 AM
bigblockv6 bigblockv6 is offline
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Default Re: Intro 1965 GMC K1502

Give the 40's a chance, I run the 50's on my truck not bad at all on noise and drone, I'm considering 40's for a bit more aggressive sound, running 2 1/2 inch pipes.
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  #49  
Old April 8th, 2018, 01:50 PM
1965GMCK1502 1965GMCK1502 is offline
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Default Re: Intro 1965 GMC K1502

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Originally Posted by bigblockv6 View Post
Give the 40's a chance, I run the 50's on my truck not bad at all on noise and drone, I'm considering 40's for a bit more aggressive sound, running 2 1/2 inch pipes.
Will do. Thanks.
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  #50  
Old April 8th, 2018, 04:05 PM
POWERSTROKE POWERSTROKE is offline
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Default Re: Intro 1965 GMC K1502

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Originally Posted by 1965GMCK1502 View Post
. Dual exhaust going in shortly. Any favorites when it comes to mufflers?
We put DynoMax cat-back on our '88 Mustang GT 5-speed in about 1993. Stock exhausts didn't last then like they do now. Bad drone at highway speeds.

Keep in mind your V-6 is a totally different animal when it comes to exhaust. I'd start with what you think would be a quieter muffler and run it 10,000 miles and see how loud it gets. A V-6 is kinda the worst of 4 cylinder and V-8 combined into one. Definitely not a smooth quiet in-line six. Think I'd run 2-1/2" pipe to the rear bumper. Your 305 V-6 needs the exhaust of a 396 V-8. It's a Big block minus two cylinders and wants to rev up under load.
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