#21  
Old 05-21-2020, 09:45 AM
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AG AG is offline
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I think the 3R is 3.625" wide and 1.125" in diameter.

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1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule.
  #22  
Old 05-21-2020, 01:09 PM
ta man ta man is offline
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Quote:
Originally Posted by rohrt View Post
I'm sure I'm being picky for no good reason but I wanted to keep my U-Joints the same front to back. Either 1350 or 1330.

Since this rear was from a mid 70s Nova it would have 1310 pinion. I would rather have a 1330 pinion yoke like I have now for my 68 bird. I was have a difficult time finding one for an 8.5. I think I found a place that sells a 8.5 30 spline 1330 pinion yoke. I need to call them. I think most 8.5 had the 3R joints. I'm still in a learning curve on that one.
https://threepedals.com/products/cus...d-pinion-seal/

I have a few drive shafts around already that would be 1330, so I could save a little money having one them shortened verses starting from scratch on everything. I don't plan on going past the current power level. I don't run slicks and I run an automatic.
Price out a full 1350setup, input yoke ,driveshaft and diff yoke...its a pretty good value and piece of mind. I wish I would have did it a few years before..cost me a transmission case and a couple dents in the floorboard..could have been worse.
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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2
373 gears 3200 Continental Convertor
best et 10.679/127.5/1.533 60ft
308 gears best et 10.76/125.64/1.5471
  #23  
Old 05-22-2020, 02:47 AM
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lust4speed lust4speed is offline
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Getting back to pinion depth. I see that the factory rearend and gears are being put back in. So if the depth was correct before, it is going to be correct going back together. Doesn't matter whether its an open, posi, or spool - the centerline of the ring gear will be unchanged and the pinion depth should remain the same.

It would have been nice to have measured the existing backlash, but setting it on the larger spec will probably be close to where it came out. I'd probably go .012" but will be interesting to see what others would do. I figure that if it was quiet when pulled and it has some miles on it, there's more chance of noise if set to a tighter tolerance now.

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1967 original owner Tyro Blue/black top 4-speed HO GTO with all the original parts stored safely away -- 1965 2+2 survivor AC auto -- 1965 Catalina Safari Wagon in progress.
  #24  
Old 05-22-2020, 05:11 PM
rohrt rohrt is offline
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I'm leaning toward just going with 3RL pinion yoke. Everything I see shows this Nova has a 1310 yoke.

I think I have a drive shaft from a 77 GP. I need to check through the junk pile to see if it has a th350 or th400 yoke. Its cheaper to shorten an existing driveshaft then ordering new.

Yes the 1350 is stronger but I won't be putting down the power to justify it. Maybe if I was running a 30 spline eaton.



Last edited by rohrt; 05-22-2020 at 05:24 PM.
  #25  
Old 05-26-2020, 09:53 AM
rohrt rohrt is offline
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Getting nowhere with pinion yokes. The place that advertised the 1330 yoke for the 8.5 still hasn't got back to me. Sounds like it was for later Truck 8.5s and they don't use the same seal. No idea if the seal would fit my housing.
https://threepedals.com/products/cus...d-pinion-seal/

I couldn't find any 3RL driveshafts at home, only a 1330 driveshafts, so I might as well just go with 1350 all the way.

Can anyone tell me if this will work for me?
https://www.dennysdriveshaft.com/p76...y_and_gm_.html

  #26  
Old 05-26-2020, 10:14 AM
ta man ta man is offline
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Quote:
Originally Posted by rohrt View Post
Getting nowhere with pinion yokes. The place that advertised the 1330 yoke for the 8.5 still hasn't got back to me. Sounds like it was for later Truck 8.5s and they don't use the same seal. No idea if the seal would fit my housing.
https://threepedals.com/products/cus...d-pinion-seal/

I couldn't find any 3RL driveshafts at home, only a 1330 driveshafts, so I might as well just go with 1350 all the way.

Can anyone tell me if this will work for me?
https://www.dennysdriveshaft.com/p76...y_and_gm_.html
Check this one out..pricey but nice!
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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2
373 gears 3200 Continental Convertor
best et 10.679/127.5/1.533 60ft
308 gears best et 10.76/125.64/1.5471
  #27  
Old 05-26-2020, 02:22 PM
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FrankieT/A FrankieT/A is offline
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I think you are over thinking this. The last 1350 pinion yoke I used on my 8.5 I got off a mid 90's pick up truck(12 bolt), bolted right on my 8.5. Pinion yoke from 8.5 to 12 bolt are interchangeable, same spline, same seal. Sometimes a little difference in the length, but you are shortening the shaft anyway. Strange makes any yoke you need in cast or forged.

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