LS Engine Mounts in 1966 K10 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**aglinks** · 06-28-2024, 12:16 PM

Does anyone know which mounts to use for a 5.3L LS in a 1966 GMC K10 chassis?

The more dig, I think my truck is a GMC chassis because it has the 305 V6 with factory riveted engine mounts towards the front of the block.

**cwcarpenter98** · 06-28-2024, 11:13 PM

The frame rails are going to be the same, you just need to get the typical mounts for fitting an LS to the chassis. You will need to remove the GMC V6 frame stands and replace them with whatever the LS needs

**aglinks** · 06-28-2024, 11:18 PM

My truck does not appear to have the same crossmember that the 2WD trucks have. That crossmember looks to be where the pedestals land…

**cwcarpenter98** · 06-28-2024, 11:33 PM

Oh right, my bad! I completely forgot that the 4wd trucks have different crossmembers. Hopefully someone who has already done an LS swap on a 4wd will chime in

06-28-2024, 12:16 PM	#1
aglinks Junior Member Join Date: May 2024 Location: Flagstaff, AZ Posts: 22	LS Engine Mounts in 1966 K10 Does anyone know which mounts to use for a 5.3L LS in a 1966 GMC K10 chassis? The more dig, I think my truck is a GMC chassis because it has the 305 V6 with factory riveted engine mounts towards the front of the block.

06-28-2024, 11:13 PM	#2
cwcarpenter98 Senior Member Join Date: Jan 2018 Location: Hickory Flat, GA Posts: 4,449	Re: LS Engine Mounts in 1966 K10 The frame rails are going to be the same, you just need to get the typical mounts for fitting an LS to the chassis. You will need to remove the GMC V6 frame stands and replace them with whatever the LS needs __________________ Christian Carpenter 1963 C10 - Frankentruck 283, Muncie 3 speed with overdrive Overdrive wiring here 1963-ish truck bed trailer - Half-Wit 1981 C10 - Penny 305, th350 --> Soon to be 350, Saginaw 4 speed 1995 Dodge Dakota Sport "I'll put it simple: if you're going hard enough left, you'll find yourself turning right." - Doc Hudson

06-28-2024, 11:18 PM	#3
aglinks Junior Member Join Date: May 2024 Location: Flagstaff, AZ Posts: 22	Re: LS Engine Mounts in 1966 K10 My truck does not appear to have the same crossmember that the 2WD trucks have. That crossmember looks to be where the pedestals land…

06-28-2024, 11:33 PM	#4
cwcarpenter98 Senior Member Join Date: Jan 2018 Location: Hickory Flat, GA Posts: 4,449	Re: LS Engine Mounts in 1966 K10 Oh right, my bad! I completely forgot that the 4wd trucks have different crossmembers. Hopefully someone who has already done an LS swap on a 4wd will chime in __________________ Christian Carpenter 1963 C10 - Frankentruck 283, Muncie 3 speed with overdrive Overdrive wiring here 1963-ish truck bed trailer - Half-Wit 1981 C10 - Penny 305, th350 --> Soon to be 350, Saginaw 4 speed 1995 Dodge Dakota Sport "I'll put it simple: if you're going hard enough left, you'll find yourself turning right." - Doc Hudson



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