I went out daily for a week and sprayed the driver side manifold bolts, finally went after them with a ratchet and all eight came out. When I looked at the bolts, none was wet down into the threads. On the passenger side, some of the bolt heads had wasted away to where the 9/16" socket wouldn't bite. I found I could get an extension bar between the fender liner and the frame with a socket on it. I think I used 13mm, and hammered it in place from the wheel well. Every bolt came right out. Dry! No spraying at all. The hammering did much more than the PB-Blaster and another spray called Yield.
You should be good with those long tube headers. I met an OP from the RV forums named Butch, on some forums Alaskan. He said headers really help the 460. Knew Gale Banks personally and said the equipment was really good but less expensive headers got the job done just as well. Always spelled Banks as Bank$. Butch died, probably 10 years ago. Rest well, Brother.
