LS engine centered and level? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1955GMC · 01-07-2013, 03:51 PM

I'm installing a LSx into a 55 GMC pick up with C-4 Corvette suspension front and rear. My using the Vette engine side brackets and donut style of insulators. My question is would it be alright if the engine went in at a slight downard tilt and 1 inch off center?

OldCreek · 01-07-2013, 04:08 PM

Downward tilt is probably o.k. depending on degree...

Drive lines degrees should not only be matched up/down but also left/right or some vibration will be had. Again, degrees matter. (I suppose you don't run a CV joint.)

1955GMC · 01-07-2013, 04:59 PM

Thanks for the quick reply. Well, in the old days we tried to keep everything level because of the carb floats. I was not sure if the unwritten law applied to the LS as well. This install would be much easier if I could leave the cab off.

Leon

**LEEVON** · 01-07-2013, 05:09 PM

You want 3-6 degrees driveline angle.

1955GMC · 01-07-2013, 06:22 PM

Quote:

Originally Posted by LEEVON

You want 3-6 degrees driveline angle.

Thanks a lot. This information will be a real help.

OKGMC4 · 01-07-2013, 07:25 PM

When I did mine I made sure to make the C4 pumpkin match what the engine ended up with. I think I had 4 degrees down on trans and 4 degrees up on pinion. And on the off center part, mine is off about that much. Had to to clear the steering.

BR3W CITY · 01-08-2013, 12:57 AM

many ls engines look to sit a little "Crooked", although its an optical illusion. Mine does, but its not actually angled.

I run the engine 4* down.

01-07-2013, 03:51 PM	#1
1955GMC Registered User Join Date: Sep 2012 Location: Surgoinsville tn Posts: 22	LS engine centered and level? I'm installing a LSx into a 55 GMC pick up with C-4 Corvette suspension front and rear. My using the Vette engine side brackets and donut style of insulators. My question is would it be alright if the engine went in at a slight downard tilt and 1 inch off center?

01-07-2013, 04:08 PM	#2
OldCreek Registered User Join Date: Jan 2007 Location: Central Coast California Posts: 1,026	Re: LS engine centered and level? Downward tilt is probably o.k. depending on degree... Drive lines degrees should not only be matched up/down but also left/right or some vibration will be had. Again, degrees matter. (I suppose you don't run a CV joint.) __________________ 1972 K20 Suburban 5.7/700r4/NP205 Dana 44/H052 Sold 1972 C10 5.3L/4L60E 12bolt 5Lug - Sold 1971 K5 Blazer 6.0L LQ9 4L60E NP205 Dana 44/H052!!! 1970 K3500 1ton CrewCab 8.1L/Allison1000/NP205 Dana 60/14B!!!! - Sold 1984 K10 SWB 7.4L/4L80e/NP208 Corp 10/12 bolt Sold 1988 V30 CCLB 7.4L/TH400/NP205/Dana 60/Dana 70/3.73!!! (Sold) 2003 K2500HD 8.1/Allison1000/NP263

01-07-2013, 04:59 PM	#3
1955GMC Registered User Join Date: Sep 2012 Location: Surgoinsville tn Posts: 22	Re: LS engine centered and level? Thanks for the quick reply. Well, in the old days we tried to keep everything level because of the carb floats. I was not sure if the unwritten law applied to the LS as well. This install would be much easier if I could leave the cab off. Leon

01-07-2013, 05:09 PM	#4
LEEVON Moderator Join Date: Jul 2006 Location: Ozark, MO Posts: 4,888	Re: LS engine centered and level? You want 3-6 degrees driveline angle. __________________ '20 Silverado Trail Boss ~ '17 Tahoe ~ '79 K15 Sierra Grande ~ '76 Blazer 2wd ~ '71 Cheyenne swb ~ '55 Pontiac Safari ~'50 3100 bagged ~ '80 Wife ~ Late model kids

01-07-2013, 07:25 PM	#6
OKGMC4 Registered User Join Date: Oct 2009 Location: Broken Arrow, OK Posts: 1,245	Re: LS engine centered and level? When I did mine I made sure to make the C4 pumpkin match what the engine ended up with. I think I had 4 degrees down on trans and 4 degrees up on pinion. And on the off center part, mine is off about that much. Had to to clear the steering. __________________ 56 GMC BUILD THREAD: http://67-72chevytrucks.com/vboard/s...d.php?t=368649 69 long bed Chevy turned 67 gmc jimmy roadster: https://67-72chevytrucks.com/vboard/...d.php?t=851167

01-08-2013, 12:57 AM	#7
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: LS engine centered and level? many ls engines look to sit a little "Crooked", although its an optical illusion. Mine does, but its not actually angled. I run the engine 4* down. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

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