The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 55.2-59 59 GMC 270-336 swap.

1project2many · 11-15-2021, 12:46 AM

I think USA built GMC frame is not Chevrolet frame. GMC engine has single mount in front, two in back. Chevy has two mounts up front. GMC crossmember is different as well. GMC core support bolts to crossmember while Chevrolet core support bolts to frame rails. Pictures:

http://67-72chevytrucks.com/vboard/s...5&postcount=10

SBC does not "bolt in."

11-15-2021, 12:46 AM	#14
1project2many Registered User Join Date: Mar 2012 Location: Lakes Region NH Posts: 3,158	Re: 59 GMC 270-336 swap. I think USA built GMC frame is not Chevrolet frame. GMC engine has single mount in front, two in back. Chevy has two mounts up front. GMC crossmember is different as well. GMC core support bolts to crossmember while Chevrolet core support bolts to frame rails. Pictures: http://67-72chevytrucks.com/vboard/s...5&postcount=10 SBC does not "bolt in."