The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 70 4x4 suburban- wanting to go big block

**kwmech** · 03-15-2017, 01:25 AM

Much easier to pull the engine forward to the next set of bolt holes in the frame (You only have to drill one side) than pounding the firewall for the valve cover and the distributor if you've got an HEI. I have not put a big block in, but I know there will be an issue with the big block oil pan hitting the factory x-member with the small block cushions. You may want to try or measure the 2wd big block cushions. I know they are thicker.

03-15-2017, 01:25 AM	#2
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,389	Re: 70 4x4 suburban- wanting to go big block Much easier to pull the engine forward to the next set of bolt holes in the frame (You only have to drill one side) than pounding the firewall for the valve cover and the distributor if you've got an HEI. I have not put a big block in, but I know there will be an issue with the big block oil pan hitting the factory x-member with the small block cushions. You may want to try or measure the 2wd big block cushions. I know they are thicker.