As I remember, the wheel opening on a 66 Coronet does not allow much tire, unless the outer body and outer wheel housing are opened up, or the rear end is lifted pretty high. I believe the 70 series tires I ran on my Coronet rubbed on both the inside and the outside wheel tub. The 66 & 67 Coronet bodies were not very tire friendly. The 65's were better, and the 68s were much improved, but the 66 & 67 not so much. Might want yo look into that if your thinking a lot of power. Gene
I don't see a lot of power in the near future. It has a 275/60 on it now, I'm just not real pleased with the 7" wheel that it's on. Pretty much the only option for a real contact patch is moving the springs in and mini tubbing it. Which isn't ruled out just yet. But motor home 440 and rebuilt 727 looks like the way to go right now.
