Or box in the frame rails and lose the tubular piece altogether. Affix the motor mounts to the inner frame rail. It looks to me that the surrent crossmember is a little far foward to use for the mounts.

1968 GTX hardtop
1968 Sport Satellite Convertible 383/4spd
1933 Plymouth coupe
2002 Ram 2500 oil burner 4x4
2015 Grand Cherokee
2013 Challenger
1957 Chrysler Saratoga


Man...I need a bigger freakin' garage.