A friend of mine paid big $$$ for his headers. He brought a friend by to look at my car one day and commented on how well the headers fit, looked and sounded. When I told him they were $159.00 Hedmans he about crapped himself. Then I told him how easy they were to install (with studs no less) and that they required NO clearancing anywhere and he was sold. Ive been told that this part # 78030 even works well for RB blocks in an A-body but never personally tried them.