Our 1974 Duster Project! Give us some ideas

There's a guy on here who welds em up and sells em pretty fair, don't remember his name. Sub-frame connectors are pretty much the first step people take prior power adders. I'd suggest you stick with the bolt in ones unless you got welding skills. You can bore out the 318, put worked X or J heads on it, a bit of a stronger cam, replace bearings/rods/seals, get an aluminum manifold and better carb then you'd be set. Could probably do all that for about a grand with some keen shopping.