Reinforced lower control arms vs. upgraded/tubular lower control arms?

@MRGTX Honestly, you really don't need either.
a. The side loads are not about the t-bars, its much more about the use and the tires. So unless your putting this into some serious sticky R's, or dirt tracking, the loads will not be there.
b. The forces the act on the lca's are not twisting the arms to any great extent.

Tell you some things that do break; sway bar linkage and brackets, rims occassionally - and they certainly flex, and if the t-bar anchors aren't welded well or rust damaged, they break free - otherwise they're fine.

So if you want to put a strap across the bottom, go for it (unless you're ruleset says its not allowed). It's not going hurt, it may help a little. If its not convenient now, don't worry about it. Its not that hard to do later.

So that's my opinion. I've flexed rims enough to slice off the wheel weights, seen several road racers and autocrossers bust swaybar linkage - I should include myself but it was on Chevi. lol. There's classic photo of one of the Chrysler France e-body 'cudas with the rally rim busted.