Bring my 73 dart swinger back to life.

I been working on her for 11 months. I'll just keep adding to this section of the forum.
I'm finished in the engine compartment. Started under the dash. Took a brake from the dash today. I am going to connect the subframe. Never did this before. The only thing I got going for me is. I was a welder for 45 years. I'm open to people who have done this job to give me some tips. Here are 3 pic's of what i did today. In the first view I have made a gosset it where i'll bolt to the floor. This is only 2-3/4" long. I will install another on the other side. Is 2 bolts good enough, or should make that bracket 5" on both sides and 2 bolts on each side. I plan to use 1/2" x 1-1/2" bolts with 1/4" backing plates inside the car. The ears will be under the front seat. For weep holes, four 1/2" holes on each connector. I plan to weld a plate on the front and a strap on the back. I only have a 318 in her now. But, I want to put a big block once I get court up with my $$$$$ flow. :coffee2:
If you go to my album you will see what's going on.