Weld In Frame Connectors

mtn are those the comp. engineering ones? I went b ack through a slew of old posts on the topic and some guys seem to claim the bolt in ones will egg shape the holes and welding is easier. Did you notice anything?

Also haveing thoughts on building my own if I can plan access to a welder I just dont want to have to open up the rear floor pans if possible.

The other bif topic of discussion was when installing do you keep weight on the suspension or the frame so the car can "un-sag"