Frame Connectors

Looking into the future to get the MP P8684286 bolt in frame connectors,did some searching here on this mod,and would like to do this,this winter.I know most will say make your own way cheaper,but not willing to go to that kind of work,and no one around here me thinks with the skill to make them ,no ****.My thoughts is to bolt them in and weld them in the early summer.So some advice and who has the bolt ins and how were they to install.Thanks Happy New year.PS this is for my 69 dart 360.