1967 Camaro Ignition Coils

[red67]

I'm having some trouble determining what is the correct coil for my 11B NOR 1967 Convertible. The car was assembled on Nov 11, 1966, and has a Tonawanda L30 327/275 with an 039 stamped (1115039) coil. I've owned this car since 1978 and the coil and correct bracket look completely original. Car seems to run fine with this coil.

I can not find any data on the 039 coil in the usual places such as parts books, Delco literature and internet searches. Does any one know what is the correct coil for this car and engine or have any information on an 039 coil?

The AIM states:

1115204 until 8-26-66
1115242 until 11-8-66
1115267 after

Parts books list:
1115202 early (1.8 ohm resistance wire)
1115238 late (1.3 ohm resistance wire)

Sometime in 1967 the resistance wire was changed to 1.35 ohms from 1.8. The AIM states in UPC12-A9 that the engine harness was changed on 10-7-66. Does anyone know if this was the date of the change in ohm resistance of the coil wire?

1968 AIM states:
1115293 for 1.3 ohm resistance wire

This seems consistent with experience with original engines. I have one of these 293 coils off an extremely original 1968 L30 327/275 Nova I parted out years ago.


Any help or comments on original coils are greatly appreciated.