reinforced k frame - is it worth it

I am about to pull my 273 and upgrading to a 408 (original v8 k frame)

Since engine, tranny, cooling will all be removed as the engine bay is cleaned up

Would it be worth it to reinforce the k frame? Firm Feel has a kit (any other kits out there)

Could kit be weld to the k frame in place or I would have to drop it as well?

I will be adding the Schumacher torque strap(TQ64a) as part of the engine swap

thanks

james