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06-15-2020, 10:17 PM
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#1 |
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Registered User
 Join Date: Apr 2012
Location: So. Florida
Posts: 873
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6L80 Fitment
I’ve had a few guys mention that even with the hi hump, the 6L80 might still have clearance issues? I’ve looked up a few different threads but they were older and no one really had much info on it back then.
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06-16-2020, 02:51 AM
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#2 |
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Senior Member
Join Date: Dec 1999
Location: Southern California
Posts: 2,884
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Re: 6L80 Fitment
I should know in the near future as a 6l90 is going in my K10.
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Richard 1972 K10 Custom Deluxe SWB Fleetside My build https://67-72chevytrucks.com/vboard/...d.php?t=800746 |
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06-16-2020, 07:55 AM
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#3 |
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Moderator
 
Join Date: Jun 2017
Location: Cherryville, NC
Posts: 2,204
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Re: 6L80 Fitment
Hi hump will work so long as you get the engine down as low as possible...try and keep the drive line angle as flat as possible....
Also remember to use a sump that keeps the bottom of the sump above to, or level with, the bottom of the cross member...CTS-V is a good choice, assuming you are usng an LS style engine. 
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Family and country before all others... 2006 Chevy Silverado (Daily Driver) 2012 Chevy Equinox 
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06-16-2020, 09:07 AM
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#4 |
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Senior Member
 
Join Date: Feb 2014
Location: new smyrna beach fl / 29 palms cal
Posts: 1,727
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Re: 6L80 Fitment
I had to go with a high hump and my engine sits as low as possible in a stock truck
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Hand made A/C vent manifolds for 64-66 trucks adapts any aftermarket A/C to OEM vent |
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06-16-2020, 10:13 AM
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#5 |
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Registered User
Join Date: Apr 2012
Location: So. Florida
Posts: 873
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Re: 6L80 Fitment
I’m running a PB Mild drop member on my setup
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06-16-2020, 09:04 AM
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#6 |
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Registered User
Join Date: Apr 2012
Location: So. Florida
Posts: 873
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Re: 6L80 Fitment
Using speed engineering oil pan for LS.
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06-16-2020, 04:06 PM
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#7 |
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Registered User
Join Date: Dec 2012
Location: Los Banos CA
Posts: 2,705
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Re: 6L80 Fitment
I have Early Classic Enterprises engine mounts and trans cross member. I just massaged my low hump to make it more round on top. I did fold the flange where the firewall and hump meet. I have about 1" between the trans and the hump. its been that way for 8 years with no problems. Unless you have raised the motor I cant see a major problem.
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1956 Chevy Bel Air 2 door 1956 Chevy 210 4 Door 1970 K20 LWB project the Hulk build w/Supercharged 4.8L-ly2/4L60E HULK BUILD 1970 C10 Yellow/White Deluxe LWB w/ 5.3L-LC9/6L80E 1968 K10 LWB Dark green my son calls it "THE HULK Jr"HULK JR *SOLD* GO GO!!!
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06-21-2020, 06:04 PM
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#8 |
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Registered User
Join Date: Aug 2014
Location: Portsmouth ri
Posts: 363
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Re: 6L80 Fitment
6l90 here and all I had to do was cut out lip where firewall meets floor. I used the low hump
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06-22-2020, 05:05 PM
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#9 |
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Old and crusty
Join Date: Jan 2009
Location: Surprise, AZ
Posts: 462
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Re: 6L80 Fitment
Some good data here.
https://paceperformance.com/p-28983-...imensions.html http://www.novak-adapt.com/knowledge...automatic/6l80 I have a high hump '64' with Early Classic engine and trans mounts and still have 3-4 inches of clearance. The 6L80 looks a bit larger in daimeter than my 4L60E but I can't imagine I would have fitment problems. Nice having 2 extra gears, but it is not as strong as the 4L60 or 4L80. They came out with a 6L90 shortly after the 6L80. Maybe this fixed some of the issues they had with the 6L80? Good luck.
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65 Chevy long wide daily driver - SOLD! 64 Chevy Short Step LS |
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