Steering Conversion 50 chev suburban

I am in the process of converting my 50 chev suburban to make room for my BB.

I have a 1971 Column and am trying to figure out which steering box would work best. I've looked at several online "new" that may work, but I really need some advice.

My chev will be heavy, so I think the stock Vega box would be to light.

I could use some good old hotrodder advice!

Thanks!

Kim