The Ford frame is different due to a different length motor and Gearbox plus a difference in mounting them too with the rear Ford mount at the rear of the box. But it appears to me that the two top Chev frames are the same and it is only the different photo angles that make it seem as though they are different. On the second photo if you draw the front edge of the bar to the side it looks a very similar distance from the door curve in both photos.
Cheers
Cliff
__________________
Cheers
Cliff Hutchings
aka MrRoo S.I.R.
"and on the 8th day he made trucks so that man, made on the 7th day, had shelter when woman threw him out for the night"
MrRoo says "TRUCKS ROOLE"