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03-18-2017, 08:17 PM | #1 |
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Join Date: Jun 2007
Location: New York
Posts: 153
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Changing drivetrain questions
I'm getting ready to change the drivetrain in my 72 long bed to a Blueprint 383 and Monster transmission with an Eaton posi. Does anyone else run this setup? I am going from the stock 350 and turbo 350. It has the 3.08 gear ratio in the back now but I have read it will be a bit sluggish cruising around. What gear ratio is everyone running or experiences have you had? I read a lot that says 3.42 or 3.73 would be a better fit...any help would be great!
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1964 volkswagon, dune buggy 1972 cehvy c 10 with 48000 miles original, bought brand new by my grandfather 1978 chevy elcamino |
03-18-2017, 09:54 PM | #2 |
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Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,794
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Re: Changing drivetrain questions
Your truck only weighs about 200 lbs. more than my Z28. The Camaro has the stock LT1, 4l60E, and a 2.72 posi rear. It will smoke the tires from a standing start.
I don't think you're going to feel sluggish with that 383. I'd drive it before you put money into the rear. |
03-19-2017, 09:13 AM | #3 |
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Join Date: Jun 2007
Location: New York
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Re: Changing drivetrain questions
Thanks for the input...I am thinking about trying it out before buying new gears to see what it's like.. I think a lot of it's personal preference for sure
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1964 volkswagon, dune buggy 1972 cehvy c 10 with 48000 miles original, bought brand new by my grandfather 1978 chevy elcamino |
03-19-2017, 09:52 AM | #4 |
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Location: lowell ma
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Re: Changing drivetrain questions
383 cubes should have no problem moving the truck out nicely with 3.08 gears..
unless you put on 30" or taller tires |
03-19-2017, 11:55 AM | #5 |
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Join Date: Mar 2012
Location: Chesapeake, Va
Posts: 1,275
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Re: Changing drivetrain questions
I have a similar setup (in my signature), with a blueprint crate, I changed my rear gears from the 3.08 to the 3.73 if you plan on doing a lot of highway driving i would keep the 3.08 and look a little higher stall converter for a quicker off the line , I noticed a big difference in highway driving before and after the rear end swap but it also has more low end get up and go
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Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks |
03-19-2017, 12:07 PM | #6 | |
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Location: New York
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Re: Changing drivetrain questions
Quote:
My Blueprint engine will be here next week..how do you like yours??
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1964 volkswagon, dune buggy 1972 cehvy c 10 with 48000 miles original, bought brand new by my grandfather 1978 chevy elcamino |
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03-19-2017, 12:08 PM | #7 |
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Join Date: Jun 2007
Location: New York
Posts: 153
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Re: Changing drivetrain questions
Thanks for the feedback..I am running a 28.5" tall tire
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1964 volkswagon, dune buggy 1972 cehvy c 10 with 48000 miles original, bought brand new by my grandfather 1978 chevy elcamino |
03-19-2017, 01:46 PM | #8 |
Senior Member
Join Date: Mar 2012
Location: Chesapeake, Va
Posts: 1,275
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Re: Changing drivetrain questions
i was always told when i was younger was a 3.55 was a good gear ,but i not know if it is available for the GM 12 BOLT
__________________
Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks |
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