Are all g body frames the same? Monte, Malibu, Regal

[Larryg]

Someone is selling a nice frame for a monte but will it work for a malibu?

 

[patmckinneyracing]

They should be exactly the same frame. The malibu, monte carlo, and el camino I know are exactly the same, minus the body panels. I pulled a core support out of a monte carlo and it was a duplicate and direct fit into my 80' malibu. So yes the frames are the same.

 

[Ribbedroof]

Montes are longer ahead of the core support.

El Caminos are longer wheelbase

Wagons have the rearmost mounts in a different location

Suitable interchanges by part number are

Buick Century 78-81
Pontiac Lemans/Grand AM 78-80

Other G body cars have different part numbers, including 81 Pontiacs

 

[andrewmp6]

What is wrong with your frame? only way to really know is use a tape measure see how far apart the body mounts and everything between the two frames.

 

[Larryg]

Nothing is wrong with mine. This is someone who has a project started from the frame up with por15, but its a monte, with a ten bolt 442 posi. I have a cutty and would like my next project to be a malibu. I'll see if he'll move just the rear end. 8)