seventy2plus2 wrote:

---

 I believe that's Corvette manifold.

---

 Yes and although the casting number is not the same as a full size Canadian Pontiac or full size Chev, it interchanges with the exhaust manifold that came on a 1966 L72 B body. I have L72 manifolds on my 66 and they fit perfectly.

LT1Caddy wrote:

---

4SPEED427 wrote:

---

seventy2plus2 wrote:

---

 I believe that's Corvette manifold.

---

 Yes and although the casting number is not the same as a full size Canadian Pontiac or full size Chev, it interchanges with the exhaust manifold that came on a 1966 L72 B body. I have L72 manifolds on my 66 and they fit perfectly.

---

 Hi...Yes, it will fit Corvette from 70-74. But it was on my BB 66 and fit fine. I bead blasted it and put brass plugs in "air" holes.  I had another pair I found without holes drilled that I installed. 

---

Do you guys have power steering in your big block 66's?   The darn power steering box often plays havoc on what exhaust manifold can be used.