Headers

Biggest problem I've seen with the Hedman design is not dragging the ground, but rather the danger of steering linkage rubbing/ interference. You may need to "adjust" the engine position/ mounts/ shim/ etc.

Back in the day, when I swapped the 340 into the 70RR body (6bbl 440 car) I used those design, and it went a lot of miles with no problems. This was long before Al Gore invented the internet LOL