Technically, yes. I believe '68-'72 will be very close. But there are always small differences. They are both A-body cars and use the same frame. Most salvage yards will have an interchange guide that should be able to help also.
24-inch rims will indeed fit on a 1973 Pontiac LeMans. The tires would have to be closer to low profile model, however.
Technically any G body from 78-87. This would include the Malibu, GMC Caballero, Olds Cutlass, Monte Carlo, Buick Regal, Pontiac Grand Prix, and 81-83 Grand LeMans.
No.
A standard Chevelle frame will not fit an El Camino as it was based on the station wagon frame
no because it poops butterflys and rainbows !:D
'64-'67 Station wagon or El camino frame.
No
No
The 455 and 400 was an option motor in the 1972 Pontiac LeMans, yes it will fit. I'm not sure if a beefier tranny was also included?
any 71 chevelle body should drop onto that frame as I believe they used the same frame.
No, they're 2 totally different bodystyles
If the car originally had a Pontiac V8, everything will fit, all Pontiac V8s have the same external dimensions. There are some differences in mounting brackets from different years, but they are usually easily solvable.