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72bigred · 02-03-2021, 01:59 AM

So no one has any ideas?

New body bushings, new suspension etc..

Without any weight my frame is perfect up front, when i drop the engine weight on the cross member the right side drops 1"..

Either the right side is dropping or the left side for some reason is not giving under the weight.. Yet it appears based on the drop of the right side of the truck the frame is just unable to handle the weight of the 402..

Measurements tell me that from Position 1 body mount on the right side I begin to drop and the drop totals 1" from that position to the tip of the horn.. from position 1 back everything is exactly the same as the left side. Frame is pristine, no accidents in its lifetime..

I could of course shim the difference, I have shimmed upwards of 1/2" in the past but this seems extreme. Would cause some issue with front bumper mounting.. No issues with the sbc I removed.. This makes me wonder if some kind of frame reinforcement is possible to keep the drop from happening..

02-03-2021, 01:59 AM	#4
72bigred Registered User Join Date: Jan 2008 Location: Spokane WA Posts: 254	Re: 72 frame twist issue So no one has any ideas? New body bushings, new suspension etc.. Without any weight my frame is perfect up front, when i drop the engine weight on the cross member the right side drops 1".. Either the right side is dropping or the left side for some reason is not giving under the weight.. Yet it appears based on the drop of the right side of the truck the frame is just unable to handle the weight of the 402.. Measurements tell me that from Position 1 body mount on the right side I begin to drop and the drop totals 1" from that position to the tip of the horn.. from position 1 back everything is exactly the same as the left side. Frame is pristine, no accidents in its lifetime.. I could of course shim the difference, I have shimmed upwards of 1/2" in the past but this seems extreme. Would cause some issue with front bumper mounting.. No issues with the sbc I removed.. This makes me wonder if some kind of frame reinforcement is possible to keep the drop from happening..