I was looking in the goodmark catalog at the floor pans for a 70 Chevelle. They list the dimesions of the floor pans, and it appears that the pans that are two part cover more length than the pans that are one piece. Is this correct? The floor is rusted that badly that i need to replace the ENTIRE floor, and I cant decide which to go with.
Thanks

The two-piece pans are probably like the three-piece pans I'm using. There's a certain amount of overlap to let you trim & fit as needed.

I think the two-piece pans would be easier to fit. I've heard the stampings are closer to stock on the two-piece pans, too.

You need to check how high up the tunnel the new pans go and make sure you have enough good metal on the tunnel on which to weld. I don't know of anybody who makes replacement tunnels, but maybe somebody does.