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"Exhaust Manifolds: --- . 64 ½-65 tab locks. 66 – tab (early) or ramp lock bolt and washers. Locking tabs must be used to lock bolts in place. Washer behind lock tab. No manifold gaskets. "My 66 is a mid May 1966 scheduled build. What would be the cutoff to define an early and/or a late build?
Gary,thanks for the information and pic, what was your source, AMK?Dave
I would have thought 6 cyl would follow similar pattern as all other '66 where the production year starts with locking tabs and then ramp-loc later. But, seem to be contradictions to this pattern, so I can't say for sure. If I was doing a restoration and had no hard reference for the particular car, I would go with lock tabs before Dec '65 and ramp-loc after.
+1. It's an easy assumption to make, but the build date on the door tag isn't when the engine was built; in the case of my Dec. '65 fastback, I went with the lock tabs since the motor was probably built at least a month before the car was run down the assembly line.
Is there an engine assembly date on an I-6 block like there is on a 289 block, and where?Jim