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Mattchu60 · 01-13-2022, 11:19 AM

Besides the cab mounting points being different, I believe the 67-72 frame is bent differently where the box area is. I believe our 73-87 frame is bent up and back down where the rear axle area is, and the box supports match that. The 67-72 frame is more flat.

I did trailing arm swap on my 87' using CPP's kit (I'm not recommending that kit, its not well engineered in my opinion). It only works on a short box frame (not sure which you have, long or short). Probably be a better solution in the end, you'll end up having a lot of headaches trying to get the 73-87 body mounted to the 67-72 frame in my opinion.

I do like the truck arms on mine - easy to adjust ride height with either different springs or using different drop blocks. Ride is nice as well.

01-13-2022, 11:19 AM	#7
Mattchu60 Registered User Join Date: Jan 2014 Location: Swaledale, IA Posts: 485	Re: Frame swap Besides the cab mounting points being different, I believe the 67-72 frame is bent differently where the box area is. I believe our 73-87 frame is bent up and back down where the rear axle area is, and the box supports match that. The 67-72 frame is more flat. I did trailing arm swap on my 87' using CPP's kit (I'm not recommending that kit, its not well engineered in my opinion). It only works on a short box frame (not sure which you have, long or short). Probably be a better solution in the end, you'll end up having a lot of headaches trying to get the 73-87 body mounted to the 67-72 frame in my opinion. I do like the truck arms on mine - easy to adjust ride height with either different springs or using different drop blocks. Ride is nice as well.