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**71CHEVYSHORTBED402** · 09-30-2024, 10:15 PM

I installed rubber cushions purchased from Classic Heartbeat, and my son and I spent 1-2 hours to get the 402 on right, with an engine hoist, until the upper and lowers CLICKED.

The frame's motor mount perches have play front to back, so I'd have start there before loosening a crossmember. Matter of fact, if memory serves me right, my crossmember only fits one way, dictated by the upper control arm brackets riveted onto the frame rails, and fixed nuts.

Speaking for an original 1971 frame anyway, factory rivets, BBC. Don't know why other years would differ, but probably some variances.

09-30-2024, 10:15 PM	#15
71CHEVYSHORTBED402 Senior Member Join Date: Feb 2009 Location: Northern Nevada Posts: 7,386	Re: Motor mount bolt holes won’t align I installed rubber cushions purchased from Classic Heartbeat, and my son and I spent 1-2 hours to get the 402 on right, with an engine hoist, until the upper and lowers CLICKED. The frame's motor mount perches have play front to back, so I'd have start there before loosening a crossmember. Matter of fact, if memory serves me right, my crossmember only fits one way, dictated by the upper control arm brackets riveted onto the frame rails, and fixed nuts. Speaking for an original 1971 frame anyway, factory rivets, BBC. Don't know why other years would differ, but probably some variances. Attached Images __________________ Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly guide (kit) for restoring this truck from the ground up, complete with details including full hardware descriptions. Much of the info. applies to all 67-72 GM. My build thread, with some info. about the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025 Last edited by 71CHEVYSHORTBED402; 09-30-2024 at 10:23 PM.