14ga frame horns for engine

[WS6]

I haven't even started mock up. I am just thinking and researching at this point. My plan is to move the motor(LT1) back towards the firewall on my TA which will necessitate me building my own frame horns to support the engine. My Lincoln 110v machine can weld up to 14ga steel. So, if I build a simple box structure similar to how the factory did it on so many cars, will that be thick enough to use to support the engine? I'm not even sure how thick the metal is on the subframe for a 2nd gen. Any other suggestions or anything else I should think about in general?



Thanks