autolite ap 45 gap is 45
Just FWIW, the gap depends on several things...
Compression ratio.
Ignition type.
Plug reach and type.
.045" would be for <10.5:1 (=/- 10%) with high voltage ignition (HEI, MSD, Or other electronically switched deal) and about .035 for a standard points deal...
The higher the C/R the less gap...
GT