Correct engine clamshells for 85 K10 small block truck - The 1947 - Present Chevrolet & GMC Truck Message Board Network

93M6Formula · 10-11-2022, 05:30 PM

Trying to help a buddy out whos trying to put new engine mounts in his truck. The truck is a mutt but the frame is an 85 K10 frame and he has a 383 in it. The old mounts must have been so shot that it didn't matter what clamshells he was using. so now he's trying to put in new stock mounts and absolutely nothing lines up. Mounts are regular stock SBC mount, clamshells are the tall ones that measure 2 3/4" from face (block mount) to centerline of bolt hole. It puts the drivers side way up when the passenger side is bolted in, this is also with the strut spacer behind it. I gave him some shorter clamshells from a 6.5 diesel truck and they were closer but still off, the measure 2 1/4".

Anyone have a clue what could be going wrong? Or if he has the wrong clamshells in general?

93M6Formula · 10-11-2022, 05:38 PM

This is what he's dealing with.

**kwmech** · 10-12-2022, 09:35 PM

Clam mounts upside down?

**Getter-Done** · 10-13-2022, 09:18 PM

Years ago, I had the same Issue as this.

It was a 2WD / 4WD thing.

Maybe the mounts on the engine are for 2WD?

v30crewcab · 10-18-2022, 09:29 AM

the 4wd use a short clamshell, due to the brace bracket that bolts on behind them. the cars used the short clamshell as well.

10-11-2022, 05:30 PM	#1
93M6Formula Registered User Join Date: Nov 2014 Location: Norfolk,NE Posts: 136	Correct engine clamshells for 85 K10 small block truck Trying to help a buddy out whos trying to put new engine mounts in his truck. The truck is a mutt but the frame is an 85 K10 frame and he has a 383 in it. The old mounts must have been so shot that it didn't matter what clamshells he was using. so now he's trying to put in new stock mounts and absolutely nothing lines up. Mounts are regular stock SBC mount, clamshells are the tall ones that measure 2 3/4" from face (block mount) to centerline of bolt hole. It puts the drivers side way up when the passenger side is bolted in, this is also with the strut spacer behind it. I gave him some shorter clamshells from a 6.5 diesel truck and they were closer but still off, the measure 2 1/4". Anyone have a clue what could be going wrong? Or if he has the wrong clamshells in general? __________________ 1982 Sierra Classic K15 RC/LB 6.2L Diesel 700R4 1988 GTA Trans AM 305 TPI 700R4 1993 Formula Firebird LT1 T56 1995 GMC K2500 ECLB 6.5L 4L80E 1996 GMC K3500 CCLB LB7 6L90

10-11-2022, 05:38 PM	#2
93M6Formula Registered User Join Date: Nov 2014 Location: Norfolk,NE Posts: 136	Re: Correct engine clamshells for 85 K10 small block truck This is what he's dealing with. __________________ 1982 Sierra Classic K15 RC/LB 6.2L Diesel 700R4 1988 GTA Trans AM 305 TPI 700R4 1993 Formula Firebird LT1 T56 1995 GMC K2500 ECLB 6.5L 4L80E 1996 GMC K3500 CCLB LB7 6L90

10-12-2022, 09:35 PM	#3
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,637	Re: Correct engine clamshells for 85 K10 small block truck Clam mounts upside down?

10-13-2022, 09:18 PM	#4
Getter-Done Senior Member Join Date: Dec 2009 Location: TN. Posts: 8,419	Re: Correct engine clamshells for 85 K10 small block truck Years ago, I had the same Issue as this. It was a 2WD / 4WD thing. Maybe the mounts on the engine are for 2WD? __________________ ________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build

10-18-2022, 09:29 AM	#5
v30crewcab Registered User Join Date: Apr 2012 Location: Chatt Tn Posts: 982	Re: Correct engine clamshells for 85 K10 small block truck the 4wd use a short clamshell, due to the brace bracket that bolts on behind them. the cars used the short clamshell as well. __________________ 88 military v30 crewcab shortbed 5.9 cummins, nv4500, 205 86 k30, 89 diesel burb, 76 gmc pathfinder 71 longbed 5.3 4l80 http://67-72chevytrucks.com/vboard/s...d.php?t=522535

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