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#26 | |
Registered User
Join Date: Jun 2014
Location: Glendale, Arizna
Posts: 1,642
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Re: My Build Thread (Sort of)
Quote:
"the 1965 and 1966 big block 396 had unique rear cam bearings and required a grooved rear cam journal, most cams you buy currently are not grooved, the groove can be cut on a lathe in the last rear journal on the later cams , centered ,and its about .188 wide and .125 deep, if the cam is cut,for that oil groove the standard cam bearing can be used".[/size] http://www.chevytalk.org/fusionbb/sh...hp?tid/311489/ I believe those heads raised the compression (98cc heads). I believe the stock heads would have had larger chambers. |
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#27 |
Registered User
Join Date: Feb 2012
Location: Smyrna TN
Posts: 1,153
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Re: My Build Thread (Sort of)
I don't believe the new cam was grooved so now I'm concerned that I'll have problems in the future. Mechanicalman I hope my engine builder knew what he was doing. I've put about 4K miles since the rebuild with no issues. The gearing and transmission will be a next year project. I would like to have more power out of the hole but the truck runs and drives so good that I just can't justify spending that much money right now. The only addition I've made lately was to add a CPP rear sway bar. It did improve body roll but it seemed to make the truck ride a little rougher. The suspension is less forgiving with rough roads.
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1971 Longbed BB Cheyenne Super 1972 Longbed SB Cheyenne Super 1972 Longbed Highlander Custom Deluxe 1975 K5 4x4 full convertible Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=645165 Greg Smyrna TN |
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#28 |
2WD Jimmy
![]() Join Date: Mar 2005
Location: Davis County, Utah
Posts: 2,564
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Re: My Build Thread (Sort of)
[QUOTE= Just behind the rear lobe on the cam there was a grove cut all the way around.E]
That cam was specific to a 1965 396. That groove was for oiling on a 65 396 block which is different than later years BBs. Sorry, didnt see post #26. |
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#29 | |
Registered User
Join Date: Jun 2014
Location: Glendale, Arizna
Posts: 1,642
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Re: My Build Thread (Sort of)
Quote:
No worries, the 3969854 block was for 69-72 396/402/454 2 & 4-Bolt that uses a non-grooved cam. You have the right style cam for your block. Usually a sway bar will make it ride rougher. If you hit a bump straight on, like a speed-bump or drainage deression, it won't make a difference. You will notice when you hit a speed bump at an angle and go through a drainage depression at an angle that the vehicle will lurch back and forth sideways. That grooved cam was for 65-66, not sure even all of 66; you can't use a non-grooved cam in a 65-66 block. It is ok, however, to use the grooved cam on a later block like you were doing albeit not necessary at all. If you used these pistons- http://www.summitracing.com/parts/sl...make/chevrolet I figure your compression to be around 8.5:1, perfect for the cam you selected. Unless you used steel shim head gaskets, or had your heads milled then you are close to 9:1. |
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#30 | |
Registered User
Join Date: Jun 2014
Location: Glendale, Arizna
Posts: 1,642
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Re: My Build Thread (Sort of)
Quote:
The 4L80E has a 3.06:1 first gear, BTW, with a .75:1 overdrive. I'd put in the trans first then address the rear end gears seeing how much lower the first gear is on the over-drives. For instance, if you had a 3.73:1 with the T400 you would have a 9.6:1 overall 1st gear. If you had the 3.73:1 with the 700R4, you would have a 11.2:1 1st gear. With the 3.42:1 that you have now, with 700R4 you have 10.43:1 first gear. T400 third gear 1:1 with 3.73:1 is 3.73:1 gas guzzler. With 700R4, 3.73:1 is 2.61:1 ratio highway cruiser. With 4L80 is 2.78:1 cruiser. I think you will find after you change the trans that you will want a posi anyway so then you will have to change the carrier. Have you seen these style diffs? A posi that does not lock up when you don't need it. http://www.summitracing.com/parts/dtl-913a315/overview/ |
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#31 |
Registered User
Join Date: Feb 2012
Location: Smyrna TN
Posts: 1,153
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Re: My Build Thread (Sort of)
Mechanicalman I appreciate all the great advice. I'm still running the original 3.08 right now. The rear end and transmission is a next spring project.
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1971 Longbed BB Cheyenne Super 1972 Longbed SB Cheyenne Super 1972 Longbed Highlander Custom Deluxe 1975 K5 4x4 full convertible Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=645165 Greg Smyrna TN |
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#32 |
Registered User
Join Date: Oct 2013
Location: Wisconsin
Posts: 162
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Re: My Build Thread (Sort of)
On the bright side, it doesn't look like she needed any body work. She sure is purtty. -Ed
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#33 |
Registered User
Join Date: Feb 2012
Location: Smyrna TN
Posts: 1,153
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Re: My Build Thread (Sort of)
Thanks Ed. Honestly I went above and beyond what anyone else (normal driver) would have done to the truck. Wheels & tires, rebuilding a transmission that would have probably lasted if left alone, sound proofing the cab, upgraded alternator, long tube headers, bigger cam, three angle valve job, etc.. are what I wanted, and I'm sure that most on this board would have done. I'm building the truck to keep and I want to know that I can take it on long trips with no major issues. Making it mine, is another way to say it.
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1971 Longbed BB Cheyenne Super 1972 Longbed SB Cheyenne Super 1972 Longbed Highlander Custom Deluxe 1975 K5 4x4 full convertible Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=645165 Greg Smyrna TN |
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#34 |
Registered User
![]() Join Date: Jun 2015
Location: weirton WV
Posts: 76
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Re: My Build Thread (Sort of)
wow sharp looking truck. love the shine on the paint job. i am waiting for my garage to be built. and then i get to start fixing mine up
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#35 |
Registered User
Join Date: Feb 2012
Location: Smyrna TN
Posts: 1,153
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Re: My Build Thread (Sort of)
Updated the wheels and tires. Grandkids like 'em!
__________________
1971 Longbed BB Cheyenne Super 1972 Longbed SB Cheyenne Super 1972 Longbed Highlander Custom Deluxe 1975 K5 4x4 full convertible Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=645165 Greg Smyrna TN |
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#36 |
Registered User
Join Date: Sep 2002
Location: Austin, Texas
Posts: 1,048
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Re: My Build Thread (Sort of)
Looks sweet , really nice truck!
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72 Cheyenne SWB C10 (daily driver) (Super fake cause I just love the glovebox emblem) 70 Camaro RS (frame-off in pieces) 70 Camaro RS (daily driver backup) 69 Custom LWB C10 (son now drives) |
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#37 |
Big Block
Join Date: Mar 2005
Location: Durham, N.C.
Posts: 1,649
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Re: My Build Thread (Sort of)
Beautiful truck.
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#38 |
Registered User
Join Date: Feb 2012
Location: Smyrna TN
Posts: 1,153
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Re: My Build Thread (Sort of)
Thank you.
__________________
1971 Longbed BB Cheyenne Super 1972 Longbed SB Cheyenne Super 1972 Longbed Highlander Custom Deluxe 1975 K5 4x4 full convertible Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=645165 Greg Smyrna TN |
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#39 |
Active Member
![]() Join Date: Dec 2003
Location: Waterbury, CT
Posts: 591
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Re: My Build Thread (Sort of)
You have beautiful grand children. God bless them. Nice truck too.
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#40 |
Registered User
![]() Join Date: Jan 2017
Location: Brookston, In
Posts: 482
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Re: My Build Thread (Sort of)
I have a 402 in my new purchase that runs really good, but is no power house by any means. I believe it is all stock.
Are you happy with the power improvement of your upgrades to your engine? |
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#41 |
Registered User
Join Date: Apr 2016
Location: Fort madison. Iowa
Posts: 21
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Re: My Build Thread (Sort of)
Love the Truck !!! Love the long bed .
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