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Now that my 340 is running and I've taken it out a couple of times playing w/ the distributor timing. It does ping when I step on it. I have premium pump gas in it.
While @ the Advance Auto Parts store I was reading the labels on the octane booster products.
1 bottle per tank etc.
Does this stuff work?
thanks

If you can, use AV Gaz...
It is interesting to note that "100-Low-Lead" actually contains more than FOUR TIMES the lead which was in Sunoco-260, one of the highest-octane fuels ever produced for street-use automobiles.

I used it in my Dodge Charger since years
My c/r is 11.5 to 1 and never had any problems
with this fuel.
Use it if you can