Engine mount questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jfnar · 08-08-2016, 10:34 AM

I have a 68 GMC with no engine. It previously had a V8 but I want to put a straight 6 in it. According to my tape measure the engine mount brackets that are in it look like they're in the correct location for a 250. Is it correct that a 250 I6 will mount to the same brackets as a V8? If I choose to use a 292, do I drill new holes in the frame on the passenger side to move that bracket forward 4" or does it require a different bracket? Haven't done this before so I'll appreciate any help.

Thanks.

Mike C · 08-08-2016, 06:01 PM

Someone could have installed a V8 on your 6 banger mounts, but the V8 mounts move motor closer to the radiator. Most likely the 6 cylinder will NOT fit using the V8 mounts, but it does work the other way around.

jfnar · 08-10-2016, 09:00 AM

According to the VIN it was originally a straight 6 truck. I have about 24" between the center of the mounts and the radiator. I'll measure the engine to make sure it'll fit but I believe it will. I guess I'll need to drill new holes for the passenger side and move it 4" forward for the 292. Thanks for the info.

08-08-2016, 10:34 AM	#1
jfnar Registered User Join Date: Jul 2009 Location: Jonesboro, AR Posts: 410	Engine mount questions I have a 68 GMC with no engine. It previously had a V8 but I want to put a straight 6 in it. According to my tape measure the engine mount brackets that are in it look like they're in the correct location for a 250. Is it correct that a 250 I6 will mount to the same brackets as a V8? If I choose to use a 292, do I drill new holes in the frame on the passenger side to move that bracket forward 4" or does it require a different bracket? Haven't done this before so I'll appreciate any help. Thanks.

08-08-2016, 06:01 PM	#2
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,715	Re: Engine mount questions Someone could have installed a V8 on your 6 banger mounts, but the V8 mounts move motor closer to the radiator. Most likely the 6 cylinder will NOT fit using the V8 mounts, but it does work the other way around. __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

08-10-2016, 09:00 AM	#3
jfnar Registered User Join Date: Jul 2009 Location: Jonesboro, AR Posts: 410	Re: Engine mount questions According to the VIN it was originally a straight 6 truck. I have about 24" between the center of the mounts and the radiator. I'll measure the engine to make sure it'll fit but I believe it will. I guess I'll need to drill new holes for the passenger side and move it 4" forward for the 292. Thanks for the info.



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