I have a 5.0/347 that's going into my 69 Bronco project. The twin V belt pulley for the power steering kit is to long for the 50oz style harmonic balancer even though it is drilled for 3 or 4 bolt pattern. There solution for me was to buy a expensive balancer from them and replace the one that came with the 347 stroker kit that's balanced to my crank and flywheel as a set. Jeff's bronco graveyard has the correct ones that work on a standard 50oz 5.0. Wish they would tell people about needing a special balancer from them. So watch out.