Manifolds

[John Inglesby]

Are both exhaust mainfolds the same on 63 & 64?

[Jason Edge]

No, Right passenger side is very different. 63 exits out bottom at center with thick ribs across front face while 64 exits out the rear.
This means several other differences:
- "Y" tail pipe is shaped different on the right side where they connect to exhaust manifold
- battery cable feeds behind the center bottom exit of the exhaust manifold in 63 and in front on 64 and is heldi n place next to RH cylinder head via a clamp. 63 simply goes around the back. 

The bolts pattern and actual bolts are however the same where the 63 & 64 exhaust manifold attach to the cylinder head.

1961 to 1964 LH Driver side Side Exhaust Manifold is the same. The Master Parts book indicated the LH side also fits 1956, 1958, and 1965 Series 75 ... so much more latitude in finding an left driver side exhaust manifold!

Here is an example of 1963 RH Exhaust Manifold:

Here is a 1964 RH Exhaust Manifold:

Here is that clamp used in 1964: