Proform Rockers

STAY AWAY!!!! I ordered a set from Mancini when I was rebuilding my 360. I installed them and when I went to back the lock nut off it broke the adjusting stud off not one but THREE! I called mancini and the rep told me they where made in China. I sent them back for a credit and ordered Ductile iron rockers for a 273 from NAPA. Stay away from them unless you want chineese parts on your car. The metal is very porus and the alluminum isn't much better.