1980 Chevy Camaro currently has a 305 can I swap the motor out with 350 no modification?
No, you can't swap a 350 into a 1980 Camaro with a 305 without modifications. While both are small-block Chevrolets, there are differences in their dimensions and mounting points that require adjustments to the engine bay, motor mounts, and possibly the transmission. Things like the oil pan, headers, and possibly even the firewall might need modifications or replacements to accommodate the larger 350.