New crossmember in my 48. Is it strong enough?

[Rwalkup]

Hello gentlemen, I'm building a 48 Chevy 3100. I just had a new center crossmember made, wondering if I need to add any more support. I boxed the frame in over the front rear shackle mounts. So they have plenty of support and strength. What I am wondering is, should I add some diagonal braces from where I boxed the frame in over the front rear shackle mounts to the new center crossmember? The reason I am wondering this is the original had that gusset brace in it. Thank you in advance for any of your comments or suggestions.

Rick