I think it all boils down to what you're going to do with the car. Most all of the cars I've built in the past have been down the strip a few times with slicks. IMO, if you do "THAT" frame connectors are a good idea.
Again, I don't disagree, but the types of force and loads a street car see compared to a competition vehicle are two very different things. Factor in also that the performance vehicle is driven by a 'car guy or gal' who notices that weird twerk in the bumpsteer or strange creak in the rear quarter, and investigates, versus most people that just turn the radio up.
Ya gotta put yourselves in the shoes of the OE engineer when you look at why they did it, just as you gotta put yourselves in the shoes of the hotrodder, when he decides to change it.
