Is there a difference in the 1968 cutlass and 442 frame. I checked under my car today and it has the nice rusty set of boxed lower control arms and rusty sway bar but the frame appears to be a standard cutlass frame. I know my 66 cutlass and 442 have to diff frames one is a ao smith and the other pontiac or parrish.

 

Short answer...nope.

 

X2 with Randy. The boxed control arms and sway bar would also have a set of rear control arm to body braces as well. You can buy those pieces pretty much anywhere now. If you have open rear control arms, you can buy the box in and have them welded in. It probably will cost you way less than buying a new set of boxed ones.

I know it's been a while since you posted this. Were you looking at changing out your frame due to rust? FYI, the frame will also be stamped in several places with the last 6 digits of the VIN. For more info on that: https://classicoldsmobile.com/forums...ped-frame.html