The HEI equipped engines use anywhere from .045-.080 gap depending on year,
model, etc.
I use the .045" gap, as this seems to be what Chevy settled on in later years.
Jim
--------------------------------------------------------------------
Jim and Janet Forbes jfo...@primenet.com
Sierra Vista, AZ URL= http://www.primenet.com/~jforbes
--------------------------------------------------------------------
Start with 0.040 and adjust from there. A stock HEI should be able to
handle 0.045 without any problems. Base your adjustments on power feel
and plug readings. Chiltons manual usually have a set of color pictures
for what your plugs should look like.