Bolt in frame connectors

Black Girl said

Tim, I welded the Mancini bolt in connectors (same as mp) in my 69 Dart conv today. You will have to trim the outside rear more than you want to get them to fit with the torque boxes. So I just drilled a bunch of 1/2 inch holes in what was left for plug welds. I had to move the parking brake cable up in the cross member. You will be instantly happy at the difference in the car.

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See this is what I'm talking about you spend the day under the car cutting Drilling and Welding and it just doesn't make sense? I don't see the Big Time Savings in researching and ordering and waiting for two pieces of 4 ft long inch and 1/2 by 2 in metal stock powder coated. (Hopefully)?
My question is after all that measuring cutting Drilling welding (almost forgot re-touching up the paint after you weld) do you feel those two pieces of metal that you bought where a great deal and a Time Savings?
Or do you think if you were given two pieces of 4 foot metal stock that you could cut and not drill and weld those in faster the first time as they would be measured to the right length the first time by you?