Welcome to CHR, Paulo. On the frame, if it were sitting in my barn I would be shopping for some re-pop rails to put it back closer to original. Not sure if the flat steel/boxed floor layout would support that or not, but the "full size Chevy frame" would be gone. That said, it's your project and you only need to please yourself on the approach. Is there any tie to the fact that it's a '41 Coupe and you chose 41Woody as your UserName?